The Hypertext Transfer Protocol (HTTP) is an application protocol for distributed, collaborative, hypermedia information systems.^[1] HTTP is the foundation of data communication for the World Wide Web.

Hypertext is a multi-linear set of objects, building a network by using logical links (the so called hyperlinks) between the nodes (e.g. text or words). HTTP is the protocol to exchange or transfer hypertext.

The standards development of HTTP was coordinated by the Internet Engineering Task Force (IETF) and the World Wide Web Consortium (W3C), culminating in the publication of a series of Requests for Comments (RFCs), most notably RFC 2616 (June 1999), which defines HTTP/1.1, the version of HTTP in common use.

Technical overview[link]

HTTP functions as a request-response protocol in the client-server computing model. A web browser, for example, may be the client and an application running on a computer hosting a web site may be the server. The client submits an HTTP request message to the server. The server, which provides resources such as HTML files and other content, or performs other functions on behalf of the client, returns a response message to the client. The response contains completion status information about the request and may also contain requested content in its message body.

A web browser is an example of a user agent (UA). Other types of user agent include the indexing software used by search providers (web crawlers), voice browsers, mobile apps and other software that accesses, consumes or displays web content.

HTTP is designed to permit intermediate network elements to improve or enable communications between clients and servers. High-traffic websites often benefit from web cache servers that deliver content on behalf of upstream servers to improve response time. Web browsers cache previously accessed web resources and reuse them when possible to reduce network traffic. HTTP proxy servers at private network boundaries can facilitate communication for clients without a globally routable address, by relaying messages with external servers.

HTTP is an application layer protocol designed within the framework of the Internet Protocol Suite. Its definition presumes an underlying and reliable transport layer protocol,^[2] and Transmission Control Protocol (TCP) predominates for this purpose. However HTTP can use unreliable protocols such as the User Datagram Protocol (UDP), for example in Simple Service Discovery Protocol (SSDP).

HTTP resources are identified and located on the network by Uniform Resource Identifiers (URIs)—or, more specifically, Uniform Resource Locators (URLs)—using the http or https URI schemes. URIs and hyperlinks in Hypertext Markup Language (HTML) documents form webs of inter-linked hypertext documents. On the Internet the World Wide Web was established in 1990 by English computer scientist and innovator Tim Berners-Lee.

HTTP/1.1 is a revision of the original HTTP (HTTP/1.0). In HTTP/1.0 a separate connection to the same server is made for every resource request. HTTP/1.1 can reuse a connection multiple times to download images, scripts, stylesheets et cetera after the page has been delivered. HTTP/1.1 communications therefore experience less latency as the establishment of TCP connections presents considerable overhead.

History[link]

Tim Berners-Lee

The term HyperText was coined by Ted Nelson who in turn was inspired by Vannevar Bush's microfilm-based "memex". Tim Berners-Lee first proposed the "WorldWideWeb" project — now known as the World Wide Web. Berners-Lee and his team are credited with inventing the original HTTP along with HTML and the associated technology for a web server and a text-based web browser. The first version of the protocol had only one method, namely GET, which would request a page from a server.^[3] The response from the server was always an HTML page.^[4]

The first documented version of HTTP was HTTP V0.9 (1991). Dave Raggett led the HTTP Working Group (HTTP WG) in 1995 and wanted to expand the protocol with extended operations, extended negotiation, richer meta-information, tied with a security protocol which became more efficient by adding additional methods and header fields.^[5][6] RFC 1945 officially introduced and recognized HTTP V1.0 in 1996.

The HTTP WG planned to publish new standards in December 1995^[7] and the support for pre-standard HTTP/1.1 based on the then developing RFC 2068 (called HTTP-NG) was rapidly adopted by the major browser developers in early 1996. By March 1996, pre-standard HTTP/1.1 was supported in Arena,^[8] Netscape 2.0,^[8] Netscape Navigator Gold 2.01,^[8] Mosaic 2.7,^{[citation needed]} Lynx 2.5^{[citation needed]}, and in Internet Explorer 2.0^{[citation needed]}. End-user adoption of the new browsers was rapid. In March 1996, one web hosting company reported that over 40% of browsers in use on the Internet were HTTP 1.1 compliant.^{[citation needed]} That same web hosting company reported that by June 1996, 65% of all browsers accessing their servers were HTTP/1.1 compliant.^[9] The HTTP/1.1 standard as defined in RFC 2068 was officially released in January 1997. Improvements and updates to the HTTP/1.1 standard were released under RFC 2616 in June 1999.

HTTP session[link]

An HTTP session is a sequence of network request-response transactions. An HTTP client initiates a request by establishing a Transmission Control Protocol (TCP) connection to a particular port on a server (typically port 80; see List of TCP and UDP port numbers). An HTTP server listening on that port waits for a client's request message. Upon receiving the request, the server sends back a status line, such as "HTTP/1.1 200 OK", and a message of its own. The body of this message is typically the requested resource, although an error message or other information may also be returned.^[1]

Request methods[link]

An HTTP request made using telnet. The request, response headers and response body are highlighted.

HTTP defines nine methods (sometimes referred to as "verbs") indicating the desired action to be performed on the identified resource. What this resource represents, whether pre-existing data or data that is generated dynamically, depends on the implementation of the server. Often, the resource corresponds to a file or the output of an executable residing on the server.

HEAD

Asks for the response identical to the one that would correspond to a GET request, but without the response body. This is useful for retrieving meta-information written in response headers, without having to transport the entire content.

GET

Requests a representation of the specified resource. Requests using GET should only retrieve data and should have no other effect. (This is also true of some other HTTP methods.)^[1] The W3C has published guidance principles on this distinction, saying, "Web application design should be informed by the above principles, but also by the relevant limitations."^[10] See safe methods below.

POST

Submits data to be processed (e.g., from an HTML form) to the identified resource. The data is included in the body of the request. This may result in the creation of a new resource or the updates of existing resources or both.

PUT

Uploads a representation of the specified resource.

DELETE

Deletes the specified resource.

TRACE

Echoes back the received request, so that a client can see what (if any) changes or additions have been made by intermediate servers.

OPTIONS

Returns the HTTP methods that the server supports for specified URL. This can be used to check the functionality of a web server by requesting '*' instead of a specific resource.

CONNECT

Converts the request connection to a transparent TCP/IP tunnel, usually to facilitate SSL-encrypted communication (HTTPS) through an unencrypted HTTP proxy.^[11]

PATCH

Is used to apply partial modifications to a resource.^[12]

HTTP servers are required to implement at least the GET and HEAD methods^[13] and, whenever possible, also the OPTIONS method.^{[citation needed]}

Safe methods[link]

Some methods (for example, HEAD, GET, OPTIONS and TRACE) are defined as safe, which means they are intended only for information retrieval and should not change the state of the server. In other words, they should not have side effects, beyond relatively harmless effects such as logging, caching, the serving of banner advertisements or incrementing a web counter. Making arbitrary GET requests without regard to the context of the application's state should therefore be considered safe.

By contrast, methods such as POST, PUT and DELETE are intended for actions that may cause side effects either on the server, or external side effects such as financial transactions or transmission of email. Such methods are therefore not usually used by conforming web robots or web crawlers; some that do not conform tend to make requests without regard to context or consequences.

Despite the prescribed safety of GET requests, in practice their handling by the server is not technically limited in any way. Therefore, careless or deliberate programming can cause non-trivial changes on the server. This is discouraged, because it can cause problems for Web caching, search engines and other automated agents, which can make unintended changes on the server.

Idempotent methods and web applications[link]

Methods PUT and DELETE are defined to be idempotent, meaning that multiple identical requests should have the same effect as a single request (Note that idempotence refers to the state of the system after the request has completed, so while the action the server takes (e.g. deleting a record) or the response code it returns may be different on subsequent requests, the system state will be the same every time.) Methods GET, HEAD, OPTIONS and TRACE, being prescribed as safe, should also be idempotent, as HTTP is a stateless protocol.^[1]

In contrast, the POST method is not necessarily idempotent, and therefore sending an identical POST request multiple times may further affect state or cause further side effects (such as financial transactions). In some cases this may be desirable, but in other cases this could be due to an accident, such as when a user does not realize that their action will result in sending another request, or they did not receive adequate feedback that their first request was successful. While web browsers may show alert dialog boxes to warn users in some cases where reloading a page may re-submit a POST request, it is generally up to the web application to handle cases where a POST request should not be submitted more than once.

Note that whether a method is idempotent is not enforced by the protocol or web server. It is perfectly possible to write a web application in which (for example) a database insert or other non-idempotent action is triggered by a GET or other request. Ignoring this recommendation, however, may result in undesirable consequences, if a user agent assumes that repeating the same request is safe when it isn't.

Security[link]

Implementing methods such as TRACE, TRACK and DEBUG is considered potentially insecure by some security professionals, because they can be used by attackers to gather information or bypass security controls during attacks. Security software tools such as Tenable Nessus and Microsoft URLScan report on the presence of these methods as being security issues.

Status codes[link]

In HTTP/1.0 and since, the first line of the HTTP response is called the status line and includes a numeric status code (such as "404") and a textual reason phrase (such as "Not Found"). The way the user agent handles the response primarily depends on the code and secondarily on the response headers. Custom status codes can be used since, if the user agent encounters a code it does not recognize, it can use the first digit of the code to determine the general class of the response.^[14]

Also, the standard reason phrases are only recommendations and can be replaced with "local equivalents" at the web developer's discretion. If the status code indicated a problem, the user agent might display the reason phrase to the user to provide further information about the nature of the problem. The standard also allows the user agent to attempt to interpret the reason phrase, though this might be unwise since the standard explicitly specifies that status codes are machine-readable and reason phrases are human-readable.

Persistent connections[link]

In HTTP/0.9 and 1.0, the connection is closed after a single request/response pair. In HTTP/1.1 a keep-alive-mechanism was introduced, where a connection could be reused for more than one request. Such persistent connections reduce request latency perceptibly, because the client does not need to re-negotiate the TCP connection after the first request has been sent. Another positive side effect is that in general the connection becomes faster with time due to TCP's slow-start-mechanism.

Version 1.1 of the protocol also made bandwidth optimization improvements to HTTP/1.0. For example, HTTP/1.1 introduced chunked transfer encoding to allow content on persistent connections to be streamed rather than buffered. HTTP pipelining further reduces lag time, allowing clients to send multiple requests before waiting for each response. Another improvement to the protocol was byte serving, where a server transmits just the portion of a resource explicitly requested by a client.

HTTP session state[link]

HTTP is a stateless protocol. A stateless protocol does not require the server to retain information or status about each user for the duration of multiple requests. For example, when a web server is required to customize the content of a web page for a user, the web application may have to track the user's progress from page to page. A common solution is the use of HTTP cookies. Other methods include server side sessions, hidden variables (when the current page contains a form), and URL-rewriting using URI-encoded parameters, e.g., /index.php?session_id=some_unique_session_code.

Secure HTTP[link]

There are three methods of establishing a secure HTTP connection: HTTP Secure, Secure Hypertext Transfer Protocol and the HTTP/1.1 Upgrade header. Browser support for the latter two is, however, nearly non-existent,^{[citation needed]} so HTTP Secure is the dominant method of establishing a secure HTTP connection.

Request message[link]

The request message consists of the following:

• A request line, for example GET /images/logo.png HTTP/1.1, which requests a resource called /images/logo.png from the server.
• Headers, such as Accept-Language: en
• An empty line.
• An optional message body.

The request line and headers must all end with <CR><LF> (that is, a carriage return followed by a line feed). The empty line must consist of only <CR><LF> and no other whitespace.^[15] Although <CR><LF> is required <LF> alone is also accepted by most servers.^{[citation needed]} In the HTTP/1.1 protocol, all headers except Host are optional.

A request line containing only the path name is accepted by servers to maintain compatibility with HTTP clients before the HTTP/1.0 specification in RFC 1945.^[16]

Response message[link]

The response message consists of the following:

• A Status-Line (for example HTTP/1.1 200 OK, which indicates that the client's request succeeded)
• Headers, such as Content-Type: text/html
• An empty line
• An optional message body

The Status-Line and headers must all end with <CR><LF> (a carriage return followed by a line feed). The empty line must consist of only <CR><LF> and no other whitespace.^[17]

Example session[link]

Below is a sample conversation between an HTTP client and an HTTP server running on www.example.com, port 80.

Client request[link]

 GET /index.html HTTP/1.1␍␊
 Host: www.example.com␍␊
 ␍␊

A client request (consisting in this case of the request line and only one header) is followed by a blank line, so that the request ends with a double newline, each in the form of a carriage return followed by a line feed. The "Host" header distinguishes between various DNS names sharing a single IP address, allowing name-based virtual hosting. While optional in HTTP/1.0, it is mandatory in HTTP/1.1.

Server response[link]

 HTTP/1.1 200 OK
 Date: Mon, 23 May 2005 22:38:34 GMT
 Server: Apache/1.3.3.7 (Unix) (Red-Hat/Linux)
 Last-Modified: Wed, 08 Jan 2003 23:11:55 GMT
 Etag: "3f80f-1b6-3e1cb03b"
 Accept-Ranges:  none
 Content-Length: 438
 Connection: close
 Content-Type: text/html; charset=UTF-8

The ETag (entity tag) header is used to determine if a cached version of the requested resource is identical to the current version of the resource on the server. Content-Type specifies the Internet media type of the data conveyed by the HTTP message, while Content-Length indicates its length in bytes. The HTTP/1.1 webserver publishes its ability to respond to requests for certain byte ranges of the document by setting the header Accept-Ranges: bytes. This is useful, if the client needs to have only certain portions^[18] of a resource sent by the server, which is called byte serving. When Connection: close is sent in a header, it means that the web server will close the TCP connection immediately after the transfer of this response.

Most of the header lines are optional. When Content-Length is missing the length is determined in other ways. Chunked transfer encoding uses a chunk size of 0 to mark the end of the content. Identity encoding without Content-Length reads content until the socket is closed.

A Content-Encoding like gzip can be used to compress the transmitted data.

See also[link]

HTTP replacements or enhancements[link]

• Representational State Transfer (REST)
• SPDY - A HTTP enhancement proposed by Google
• Waka (protocol) - A HTTP replacement proposed by Roy Fielding
• HTTP-MPLEX - A backwards compatible enhancement to HTTP to improve page and web object retrieval time in congested networks proposed by Robert Mattson
• HTTP 2.0 - currently being worked on by the IETF's Hypertext Transfer Protocol Bis (httpbis) working group.^[19]
• Constrained Application Protocol - A semantically similar protocol to HTTP but used UDP or UDP-like messages targeted for devices with limited processing capability. Re-uses HTTP and other internet concepts like Internet media type and web linking (http://tools.ietf.org/html/rfc5988).

Further Information[link]

• Basic access authentication
• Content negotiation
• HTTP compression
• Hxxp

Related topics and technologies[link]

• Curl-loader - HTTP/S loading/testing open-source SW
• Digest access authentication
• List of file transfer protocols
• List of HTTP headers
• List of HTTP status codes
• Web cache
• WebDAV

References[link]

Further reading[link]

• HTTP 0.9 - As Implemented in 1991

External links[link]

Wikimedia Commons has media related to: HTTP

• "Change History for HTTP". W3.org. http://www.w3.org/Protocols/History.html. Retrieved 2010-08-01.  A detailed technical history of HTTP.
• "Design Issues for HTTP". W3.org. http://www.w3.org/Protocols/DesignIssues.html. Retrieved 2010-08-01.  Design Issues by Berners-Lee when he was designing the protocol.
• "Classic HTTP Documents". W3.org. 1998-05-14. http://www.w3.org/Protocols/Classic.html. Retrieved 2010-08-01.  list of other classic documents recounting the early protocol history

Kimi Räikkönen

Räikkönen at the 2010 Rally Bulgaria
Born	(1979-10-17) 17 October 1979 (age 32) Espoo, Finland
Formula One World Championship career
Nationality	Finnish
2012 team	Lotus-Renault
2012 car #	9
Races	163 (162 starts)
Championships	1 (2007)
Wins	18
Podiums	64
Career points	630
Pole positions	16
Fastest laps	36
First race	2001 Australian Grand Prix
First win	2003 Malaysian Grand Prix
Last win	2009 Belgian Grand Prix
Last race	2012 Monaco Grand Prix

Kimi-Matias Räikkönen (Finnish pronunciation: [ˈkimi ˈmɑtiɑs ˈræikːønen]; born 17 October 1979 in Espoo) is a Finnish racing driver. He drives in Formula One for Lotus in 2012. After nine seasons racing in Formula One, in which he took the 2007 Formula One World Drivers' Championship, he competed in the World Rally Championship from 2010–2011.

Räikkönen entered Formula One as a regular driver for Sauber-Petronas in 2001. Having previously only raced in very junior open-wheel categories, he was given his Super Licence from the Fédération Internationale de l'Automobile (FIA) after a performance delivery promise by his team boss, Peter Sauber.^[1] He joined McLaren Mercedes in 2002, and became a title contender by finishing runner-up in the 2003 and 2005 championships to Michael Schumacher and Fernando Alonso, respectively. Räikkönen's 2003 and 2005 seasons were plagued by severe unreliability from his McLaren cars.

Räikkönen switched to Ferrari in 2007, becoming the highest paid driver in motor sport with an estimated wage of $51 million per year.^[2] In turn his move to Ferrari saw him secure his first Formula One World Drivers' Championship, beating McLaren drivers Lewis Hamilton and Fernando Alonso by one point, as well as becoming one of the very few drivers to win in their first season at Ferrari. In 2008, he equalled the record for fastest laps in a season for the second time. After one more year in the sport, he left the Ferrari F1 team to drive a Citroën C4 WRC for the Citroën Junior Team in the World Rally Championship for 2010. Along with rallying, Räikkönen has turned his attention towards NASCAR,^[3] and made his debut for Kyle Busch Motorsports in the Camping World Truck Series.

In 2008, Räikkönen was among the two Formula One drivers who made it into the Forbes magazine's The Celebrity 100 list, the other being Fernando Alonso. He is 36th on Forbes magazine's The Celebrity 100 list of 2008, and 41st on the previous year.^[4] On the same list, as of 2008, he is listed as the 26th highest paid celebrity overall and the 5th highest paid sportsman behind Tiger Woods, David Beckham, Michael Jordan and Phil Mickelson. In 2009, Räikkönen was listed as the equal 2nd highest paid athlete in the world, behind Woods.^[5] Räikkönen has signed a 2 year deal with Lotus starting with the 2012 Formula One season.

Career[link]

Early career (until 2000)[link]

Räikkönen had a long line of success in karting from the age of ten. His first race outside Finland was in Monaco when he was 15 years old. During the race, the steering wheel broke, but he continued, informing his mechanic by frantically waving the steering wheel in the air on the home straight. Räikkönen's next Monaco race was also memorable; he was thrown on the wrong side of the safety fence in a first lap collision, but continued driving until running out of road. Undeterred, he lifted his kart back on to the track and continued to race. His mechanic thought Räikkönen had retired, but he eventually caught up with the other competitors and finished third.^[6] In 1998 he was 1st in the Nordic (karting) Championship at Varna in Norway. In 1999, Räikkönen placed second in the European Formula Super A championship, and also competed in the Formula Ford Euro Cup. By the age of twenty, he had won the British Formula Renault winter series of 1999, winning the first four races of the year. In 2000, he won seven out of ten events in the Formula Renault UK Championship. Combined, over these two series of Formula Renault, he won 13 out of 23 events – a 56% win rate.

Sauber (2001)[link]

On the basis of these results, Peter Sauber gave the Finn a test with the Sauber Formula One team in September 2000 at the Mugello Circuit.^[7] After further tests in Jerez and Barcelona, Sauber signed Räikkönen for the 2001 season. However, some critics (including FIA president Max Mosley) voiced concerns over granting an F1 Super Licence to such an inexperienced driver; Räikkönen had only 23 car races to his credit. He was nevertheless granted his license and scored a championship point in his debut at the 2001 Australian Grand Prix. Räikkönen was asleep 30 minutes before the race.^[8]

Räikkönen had a solid debut year, achieving four points-scoring finishes and eight finishes in the top eight. Completing the year with 9 points, Räikkönen, along with teammate Nick Heidfeld, helped Sauber to what was then its best result of fourth place in the constructors' championship.

McLaren (2002–2006)[link]

Räikkönen, long linked to Sauber's engine supplier Ferrari, instead sufficiently impressed McLaren to earn a race seat in Ron Dennis's team for 2002, taking the seat left vacant by double-world champion, mentor and fellow Finn Mika Häkkinen.

Räikkönen at the United States Grand Prix in 2002.

2002[link]

Räikkönen scored a third-place podium finish in his first race with McLaren, the 2002 Australian Grand Prix. Although McLaren suffered many Mercedes engine failures in 2002, Räikkönen scored 24 points and four podiums, and held his own against teammate David Coulthard. Räikkönen came close to winning his first Grand Prix in France, but went off track at the Adelaide hairpin with a handful of laps to go, because of oil from the blown engine of Allan McNish's Toyota on the circuit.^[9] He finished the race second. He finished the season in sixth place, one place behind his team mate; together they achieved a solid third place for McLaren in the constructors' championship.

2003[link]

At the opening Australian Grand Prix, Räikkönen qualified 15th in the spare car. In the race he took the lead before being caught speeding in the pitlane, after a software glitch in the car's electronic system. Räikkönen held off Michael Schumacher to finish 3rd. In Malaysia, Räikkönen won his first race^[9] after starting from 7th on the grid. During the next round in Brazil, Räikkönen was declared the winner after the race was stopped on lap 55. According to the rules the winner is decided by the race order as of two laps before the race stopped, i.e. lap 53. However a week later, evidence emerged that Giancarlo Fisichella was on lap 56 when the race stopped, therefore the winner was decided by the order at lap 54. This granted the win to Fisichella, with Räikkönen 2nd.

As other teams improved their cars, McLaren, who were still using the 2002 chassis, began to falter in terms of race speed. However, Räikkönen finished 2nd at Imola. At the Spanish Grand Prix, Räikkönen made a mistake in qualifying and had to start from the back of the grid, and at the start, he collided with Antônio Pizzonia, who was stuck on his grid position owing to a launch control problem, causing Räikkönen to retire from the race.

The next few races came down more to strategy rather than speed. While having engine problems, Räikkönen successfully defended his 2nd position from Rubens Barrichello in Austria. He came extremely close to winning in Monaco, but lost by less than a second to Juan Pablo Montoya. Starting from the pitlane in Canada after he went off track during qualifying with understeer, Räikkönen finished 6th, more than a minute adrift of race winner Michael Schumacher.

Räikkönen at the 2003 French Grand Prix.

At the European Grand Prix, Räikkönen took pole, and controlled the race from the start until his engine failed on lap 25. Title rival Michael Schumacher finished 5th taking 4 points advantage from Räikkönen. Räikkönen finished 4th in France behind Schumacher but finished one point ahead of him with a 3rd place finish at the British Grand Prix. Räikkönen failed to finish the German Grand Prix after being involved in an accident at the first corner with Ralf Schumacher and Rubens Barrichello. Räikkönen finished 2nd at the next race, the Hungarian Grand Prix.

Before the Italian Grand Prix, the FIA were tipped-off by rivals Ferrari about a tyre-illegality in the Michelin tread width.^{[citation needed]} Michelin were forced to bring in narrower tyres and it seemed as if they had lost the advantage they had been enjoying over Bridgestone all season. McLaren also announced that they would see out the season with old the MP4-17D chassis and would not bring out the MP4-18 as had been planned. Räikkönen eventually finished 4th in the race, losing five championship points to race winner Michael Schumacher.

Räikkönen took pole at the United States Grand Prix, but Michael Schumacher won the race with Räikkönen finishing 2nd. With one race to go, Schumacher only needed one point to win the championship. Räikkönen would need to win the next race with Schumacher not scoring any points. After qualifying 8th in Japan, Räikkönen finished 2nd while Michael Schumacher just slipped into the points to win his 6th World Championship. Montoya's retirement during the race also meant that Räikkönen finished 2nd in the championship, just two points behind Schumacher. The team also narrowly lost second place in the constructors' championship, finishing third, two points behind runners-up Williams, and 12 points behind Ferrari. Mathematically, Williams or McLaren could have won the championship at the very last race. The 2003 season was one of the closest in recent years.

2004[link]

The McLaren mechanics push Kimi Räikkönen's MP4-19 into the garage during qualifying at the 2004 United States Grand Prix.

The 2004 season began with Räikkönen only claiming a single point in the first seven races. His McLaren, especially the Mercedes engine, suffered repeated breakdowns, allowing him to complete just two of the first seven events. After seven rounds Räikkönen had only one point to Michael Schumacher's 60. In Canada, Räikkönen made 5 pit-stops but was classified 5th since the Williams-BMWs and the two Toyotas were disqualified. At the United States Grand Prix, Räikkönen finished 6th.

At the French Grand Prix, McLaren rolled out the new MP4-19B. Räikkönen finished 7th behind his team-mate, David Coulthard. At Silverstone, Räikkönen took pole and went on to finish second behind Michael Schumacher. Following on from this encouraging display, the McLarens qualified on the 2nd row of the grid in Germany. Both cars got off to a good start, however Räikkönen lost his rear wing on lap 13 of the race while following race leader Michael Schumacher. He retired again from the Hungarian Grand Prix after starting from 10th place on the grid, again on lap 13. At the Belgian Grand Prix, Räikkönen qualified 10th, but took the lead on lap 11 and held on to it to take McLaren's only win of the season. He also took the fastest lap. The next weekend at Monza, Räikkönen again retired on lap 13, this time owing to electrical problems. At the next race in China, he finished 3rd, only 1.4 seconds behind race winner Rubens Barrichello.

At the Japanese Grand Prix, Räikkönen was shunted by Felipe Massa on the first lap of the race, which caused him handling problems. He later managed to make up some ground: he finished 6th, 2.5 seconds behind Alonso. At the last race of the season, the Brazilian Grand Prix, he overtook pole sitter Barrichello, even before they had reached Curva De Sol. Räikkönen later battled Montoya for the lead and finished 1 second behind him in 2nd. Räikkönen ended the year seventh, with 45 points, only one behind sixth placed Jarno Trulli, and four podiums.

Despite the disappointment of the 2004 season, Räikkönen was still seen as one of the rising stars of the sport, along with BAR's Button, Renault's Alonso and 2005 McLaren teammate Montoya. Many pundits predicted 2005 to be filled with great on-track battles from a resurgent team. He was also referred to by Ross Brawn and Jean Todt as a driver whom Ferrari might consider in the future. In early November 2004, Räikkönen announced his intention to create a racing team with his manager Steve Robertson, to be entitled Räikkönen Robertson Racing (otherwise known as "Double R"), which would compete in Formula Three in 2005.

2005[link]

Räikkönen at the 2005 Canadian Grand Prix.

Räikkönen at the 2005 United States Grand Prix.

Räikkönen's start to the 2005 season season was less than perfect. The car was reported to be too soft on its Michelin tyres, with the result that it was not generating enough heat to post competitive qualifying times.^[10] The best qualifying position that a McLaren driver could manage in the first 3 races was 6th. Räikkönen compounded this by stalling on the grid of the first race of the season, the Australian Grand Prix, and ending the race with just a point. He looked set for a podium in Malaysia until a faulty tyre valve failed and dropped him out of the points. Bahrain saw him achieve his first podium of the season with a third place behind Renault's Alonso and the Toyota of Jarno Trulli.

Räikkönen then achieved three consecutive poles in San Marino, Spain, and a win after a safety car strategy call by Neil Martin at Monaco. An almost certain win was denied at Imola after a driveshaft failure, but he won the other two races, putting him within 22 points of leader Alonso. He registered strong, comfortable wins at Barcelona, beating local boy Alonso and at Monte Carlo, never dropping his lead in both races. At the European Grand Prix, Räikkönen flat-spotted his right front tyre while lapping Jacques Villeneuve. The resultant vibrations caused his suspension to fail while he led on the final lap, sending him into the tyre wall and handing a further ten points to his rival Alonso. Changing a tyre would have given him a relatively safe third place. However, tyre changes were only allowed in 2005 in cases where a "punctured or damaged tyre" could be changed for "clear and genuine safety reasons"^[11] and there was no precedent for whether the stewards would consider a flat-spotted tyre dangerous enough. This incident, in part, resulted in a rules clarification allowing teams to change a flat-spotted tyre without punishment.^[12]

Alonso's first major mistake of the 2005 season handed the Canadian Grand Prix to Räikkönen. The following weekend saw all the Michelin teams, including McLaren, withdraw from the United States Grand Prix for safety reasons. At the French Grand Prix, Räikkönen suffered a ten-place grid-penalty following the replacement of his new specification Mercedes Benz engine which failed in Friday practice. Räikkönen, putting in what Ron Dennis called his best ever qualifying lap,^[13] qualified 3rd (demoted to 13th) with a significant fuel load. He finished 2nd behind Fernando Alonso. A week later at the British Grand Prix, Räikkönen suffered another Mercedes engine failure due to an oil leak; his 2nd place qualifying place became 12th. He claimed 3rd place in the race.

In Germany, Räikkönen was comfortably in the lead having dominated all weekend, but suffered a hydraulics failure, handing victory and a further 10 points to Alonso. It was his third retirement while leading a race during the season. On all three occasions, it was championship rival Alonso who took advantage to win. Significantly, at the opening of the Hungarian Grand Prix, though saying he was very comfortable at McLaren, Räikkönen raised the possibility that he might leave McLaren when his contract expired in 2006 if reliability issues were not solved.^[14] He told a news conference, "We need to work in a better way just to make sure that the car is very reliable."^{[citation needed]} However he went on to take the chequered flag with a convincing victory over Michael Schumacher, albeit after McLaren teammate Montoya retired with driveshaft failure while leading.

Räikkönen won the Hungarian Grand Prix from the most handicapped qualifying position, having had to do his qualifying run first on the notoriously dusty and dirty track because of his early retirement a week earlier at Hockenheim. No other driver had previously managed this feat. Räikkönen then became the first ever winner of the Turkish Grand Prix. Two weeks later at the Italian Grand Prix, Räikkönen's pole position was taken from him as he received another 10-position grid penalty for an engine change. It would emerge that he had 5 laps of fuel more than teammate Montoya and 6 more than Alonso during qualifying – and still managed to outpace them.^{[citation needed]} During the race, Räikkönen was forced to take an extra stop when his left-rear tyre delaminated, which dropped him down to 12th. He recovered, but spun his car after pushing too hard while chasing Giancarlo Fisichella. He eventually finished fourth.

He went on to win, for the second year in a row, in Belgium at Spa-Francorchamps. The following race, the Brazilian Grand Prix, saw Alonso clinch the Drivers' Championship, after finishing third behind Montoya and Räikkönen. In the penultimate race of the year, at the Suzuka Circuit in Japan, Räikkönen took his 7th victory of the season after starting 17th on the grid (as rain, and an engine failure for Räikkönen, had mixed up the qualifying grid). The win was secured when he overtook Renault driver Fisichella (who had started third on the grid, and had led most of the race) on the final lap – which Formula One journalist Peter Windsor thought the most impressive move of the race.^[15]

Räikkönen received the F1 Racing "Driver of the Year" accolade,^[16] and the Autosport "International Racing Driver of the Year" award.^[17]

2006[link]

Räikkönen testing for McLaren at Valencia in early 2006.

In Bahrain, Räikkönen suffered electronic problems during Friday practice and a spectacular rear suspension breakage during the first qualifying session, which forced him back to 22nd place on the grid. Nevertheless he drove through the field, ending third behind Alonso and Michael Schumacher. In Malaysia, Räikkönen was hit from behind by Red Bull Racing's Christian Klien on the first lap. The impact caused a left rear suspension failure resulting in Räikkönen retiring from the race.

Having started the year clearly behind Renault, McLaren improved in Australia, where Räikkönen finished second after flat spotting a tyre and losing a wing end-plate, which caused him to fall off the pace somewhat around the midpoint of the race. Chasing down Alonso during the final stages of the race, he set the fastest lap of the race on the final lap, finishing only 1.8 seconds behind the Spaniard. At the San Marino Grand Prix, a bad choice of strategy and a mistake from Räikkönen in qualifying (8th) saw the McLarens get caught in traffic in the early part of the race allowing Michael Schumacher and Alonso to get away at the front. Räikkönen eventually finished 5th, with team mate Montoya ahead in 3rd place. McLaren team boss Ron Dennis blamed what he deemed to be Räikkönen's poor performance for the team's failure to finish in the top two in the race.^[18]

Räikkönen testing for McLaren at Silverstone in April 2006.

At the Spanish Grand Prix, Räikkönen qualified 9th. However, he managed to get up to 5th place on the first lap of the race. He retained this position for most of the race, finishing in 5th place. A few days after the Spanish Grand Prix, he admitted that he had no chance of winning the 2006 Championship.^[19] In Monaco, Räikkönen qualified third. During the race he got up to 2nd and kept pace with Alonso, however he retired during a safety car period after a failed heat shield led to a wiring loom inside the car catching fire. After the retirement he was seen on live TV walking along the Monaco sidewalks with his helmet still on to the harbour and climbing aboard a yacht.

The British Grand Prix at Silverstone saw Räikkönen qualify second behind Alonso and in front of Michael Schumacher. The running order was Alonso, Räikkönen, Schumacher until the second set of pitstops where Räikkönen was demoted to third by Schumacher, a position he held until the end of the race. In Canada, Räikkönen achieved another podium. In the United States Grand Prix, his teammate punted him out in an expensive seven car accident. The French Grand Prix saw Räikkönen qualify his car in sixth. His teammate was now former test driver Pedro de la Rosa in place of Montoya. Räikkönen ended the race in fifth. In Germany, Räikkönen qualified on pole. After a battle with Jenson Button, he finished the race for the first time in his career, ending in third place. Another pole came in Hungary, but he collided with Vitantonio Liuzzi after 25 laps, causing his fourth retirement of the season.

A first turn incident with Scott Speed at the Turkish Grand Prix led to an exploded tyre and suspension damage. After a tyre change, Räikkönen's race ended half way into the next lap when he crashed into the barrier at turn 4 because of a loss of rear grip. Räikkönen qualified on pole for the Italian Grand Prix by 2 thousandths of a second from Michael Schumacher. He led the early part of the race until the first pitstops where he was passed by Schumacher. He stayed in second place for the rest of the race. After the race, Schumacher announced that he would retire at the end of the season. Later, Ferrari announced that he would be replaced in the 2007 season by Räikkönen.^[20]

The Chinese Grand Prix saw another retirement for Räikkönen due to throttle problems. His last two Grands Prix, in Japan and Brazil, did lead to 2 finishes, but he missed the podium on both occasions. Räikkönen ended his time at McLaren-Mercedes with a fifth place in the World Drivers' Championship, with McLaren placing third in the World Constructors' Championship at the end of a winless year.

Räikkönen's British Formula Three Championship team Räikkönen Robertson Racing claimed their first major success, with British driver Mike Conway winning the 2006 British F3 International Series title and the prestigious Macau Grand Prix.

Ferrari (2007–2009)[link]

After the 2006 Italian Grand Prix, Ferrari announced that Räikkönen had signed a three-year contract with Scuderia Ferrari for the 2007–2009 seasons. Räikkönen said after the move that he was very happy with this change of events but wished McLaren the best of luck in the future. He became the team mate to Brazilian Felipe Massa, who had been driving for Ferrari since 2006. Following the retirement of Michael Schumacher and his new deal with Ferrari, Räikkönen was estimated to be the highest paid driver in F1, with a base salary reportedly worth US $51M annually.^[2]

2007[link]

Räikkönen driving for Ferrari at the 2007 United States Grand Prix, where he finished fourth.

Räikkönen won his third race of 2007 at Silverstone.

Räikkönen started the season in Australia by taking pole position, setting the fastest lap and becoming the first driver since Nigel Mansell in 1989 to win his first Grand Prix with Ferrari. In 2010 Fernando Alonso matched this achievement at the 2010 Bahrain Grand Prix. This was the first time in his career that he had managed the hat-trick of pole position, fastest lap and race victory.

At the Malaysian Grand Prix, Räikkönen was passed by Lewis Hamilton at the start and remained behind him for the rest of the race, finishing third. In Bahrain, Räikkönen started from third but was passed by McLaren driver Fernando Alonso. He eventually regained 3rd position from Alonso and finished the race 3rd. At the Spanish Grand Prix, Räikkönen retired after only 10 laps with an electrical problem. This took him down to fourth position in the Championship, behind team-mate Felipe Massa. At the Monaco Grand Prix, Räikkönen struck a barrier in qualifying and broke his right front suspension. He started 16th and finished 8th.

In Canada, Räikkönen qualified fourth and finished fifth, Räikkönen's team-mate Massa was disqualified.^[21] At the United States Grand Prix, Räikkönen qualified fourth, finished fourth and recorded fastest lap of the race. With ten races in the season left, Räikkönen was 26 points behind leader Lewis Hamilton in the Drivers' Championship.

In France, Räikkönen qualified third, but overtook Hamilton at the first corner of the race. He subsequently ran second, behind team-mate Massa, for much of the Grand Prix, but overtook the Brazilian during the pit-stops and took his second victory of the season. This was the 11th victory of his Formula One career, as well as Ferrari's first 1–2 win of the 2007 season.^[22] At the British Grand Prix, Räikkönen qualified in second place, just missing the pole by running wide in the last corner. In the race, he again took the lead through pit stops, first overtaking Lewis Hamilton midway through the race and then putting in fast laps as Fernando Alonso pitted for the second time in the closing stages to pass him. Räikkönen led to the end of the race.^[23]

At the European Grand Prix, Räikkönen captured his second pole position of the season, but retired from the race, run in heavy rain, with a problem with the hydraulics of the car. In Hungary, Räikkönen qualified his car in fourth place, but started from third after Fernando Alonso was penalised. In the race he overtook Nick Heidfeld at the start and pressured Hamilton until the end, but had to settle for second, being 0.7s behind Hamilton. He set the fastest lap time on the last lap of the race, commenting after the race: "I was so bored behind Hamilton, I wanted to see how quick I could have been." In Turkey, Räikkönen missed pole position after making a mistake in the final sector of his fast lap, which left him third on the grid. On race day, he overtook Hamilton in the first corner and took second place, which he kept to the end of the race.

At Monza's third practice session, Räikkönen crashed into the tyre wall before entering the Ascari chicane. He qualified in fifth place, and raced in the Ferrari reserve car while suffering from a neck problem. The Ferrari team employed an unusual one-stop strategy, which left him third after Hamilton passed him late in the race on fresh tyres.^[24] At Spa-Francorchamps, Räikkönen's favourite circuit,^[25] he secured pole position again and took his fourth victory of the season. Massa finished second, Alonso third and Hamilton fourth. This was also Räikkönen's third consecutive Spa win, which placed him among six other drivers with three or more Spa wins.

Räikkönen at Spa, where he won his fourth race of the year.

At the Fuji Speedway in Japan, the only new track on the 2007 calendar, Räikkönen qualified in third position, while Hamilton took pole and Alonso second. In an extremely wet race, which saw the first 19 laps run behind the safety car, both Räikkönen and team-mate Massa were badly affected by having to change to extreme wet tyres during the early stages, because the FIA's tyre-rule notification arrived late at Ferrari.^[26] Towards the end of the race, Räikkönen moved through the field to third place, but could not pass his fellow countryman Heikki Kovalainen for second.

At the Chinese Grand Prix in Shanghai, Räikkönen dominated the whole weekend with fastest laps in the free-practice sessions. In qualifying, Hamilton took pole position with a lighter fuel load, while Räikkönen qualified second and Massa third. There was light rainfall at the beginning of the race which prompted the cars to start on intermediate tyres. After the first round of pit stops Hamilton lost grip as his tyres suffered graining, and Räikkönen overtook him. Hamilton retired after sliding into a gravel trap in the pit lane. Räikkönen took his fifth win of the season, that revived his title hopes before the last race of the season. This was also the 200th race win and 600th podium in Ferrari's Formula One history. Räikkönen moved to seven and three points behind Hamilton and Alonso in the Drivers' Championship, respectively, going into the last race in Brazil, the first three-way title battle in the final race of the season since 1986.

Räikkönen celebrating victory and the world title at the 2007 Brazilian Grand Prix.

Räikkönen took the 2007 Formula One Drivers' title with victory in the Brazilian Grand Prix at Interlagos, in an incident-packed race. Massa had taken pole, followed by Hamilton, Räikkönen, and Alonso. At the start of the race Räikkönen passed Hamilton on the outside and lined up behind Massa. Alonso shortly afterwards passed Hamilton, who fell progressively down the order. Räikkönen eventually overtook Massa, who was already eliminated from contention for the Driver's Championship in the Japanese Grand Prix. Massa's strategy for the second round of pit stops ensured Räikkönen kept the lead. Räikkönen went on to take the chequered flag, which handed him the crown by a single point from Hamilton and Alonso. Championship leader Hamilton eventually finished the race in seventh place, while defending champion Alonso managed third.

While Räikkönen had only one point more than Alonso and Hamilton at the end of the season, he had the most victories (six compared to four by each McLaren driver).^[27]

Räikkönen's Drivers' championship was briefly put into doubt when race stewards began an investigation after identifying possible fuel irregularities in the cars of Nico Rosberg, Robert Kubica and Nick Heidfeld following post-race inspection. Their disqualification and a race reclassification would have seen Hamilton lifted from seventh to fourth in the race result.^[28][29][30] However the race stewards decided that no sanctions would be given, meaning the results would stand.^[31] McLaren appealed against the decision,^[32] however the FIA Court of Appeal rejected their appeal on 16 November 2007 thus confirming Räikkönen as the champion.^[33]

2008[link]

After a disappointing first race for Ferrari in Australia where Räikkönen eventually finished eighth after starting 15th on the grid owing to a mechanical problem in qualifying, he won his first race of the 2008 season at the Malaysian Grand Prix, finishing ahead of Robert Kubica and Heikki Kovalainen. His victory in Kuala Lumpur came on the fifth anniversary of his maiden victory at the same track. In Bahrain, Räikkönen qualified in fourth on the grid. He moved up to second place by the third lap and finished in that position, behind his team-mate Felipe Massa. He also secured the lead in the championship.

Räikkönen took his first win of 2008 at the Malaysian Grand Prix.

In Spain, Räikkönen took the 15th pole of his career and his first of the 2008 season. He managed to take his second race win of the season and the fastest lap of the race. Räikkönen overtook Mika Häkkinen in the list of total number of fastest laps and also in terms of podium finishes, making him the highest ranked Finnish driver in these statistics.

At the Turkish Grand Prix, Räikkönen qualified in fourth place. Despite damaging his front wing in the early stages after a collision with fellow Finn Heikki Kovalainen, Räikkönen was still able to set the fastest lap and finish in third place.

In Monaco, Räikkönen qualified in second behind teammate Felipe Massa. Räikkönen stayed second behind Massa until he was given a drive-through penalty for an infringement by the team on his car and dropped down to sixth. He was set for fifth until an incident with Adrian Sutil, when Räikkönen lost control on the damp track after exiting the tunnel, and hit Sutil's car in the rear. Räikkönen's car was not badly damaged and he was able to finish in ninth after replacing his front wing, also setting the fastest lap in the process.^[34] After the race, Mike Gascoyne, the Chief Technology Officer of Force India announced they were filing official protests with the stewards over the incident, demanding a ban for Räikkönen.^[35] However, the stewards decided not to penalise him.

Räikkönen driving for Ferrari at the 2008 Canadian Grand Prix.

In Canada, Räikkönen qualified third. In the race, he set the fastest lap during the first stint while catching up with Robert Kubica who was in second place. The safety car was deployed when Adrian Sutil's car broke down in a dangerous position. Both he and Kubica jumped ahead of race leader Lewis Hamilton when they pitted during the safety car period. As there was a red light at the end of the pitlane, Räikkönen and Kubica stopped alongside each other and waited for the signal to allow them back on to the circuit. Hamilton failed to notice the red light and hit the rear of Räikkönen's Ferrari, eliminating both cars.

Räikkönen went on to take his 16th pole position in France, which was the 200th pole for Scuderia Ferrari.^[36] Räikkönen dominated the race as he set the fastest lap and had a six second lead until a bank exhaust failure some half way through the race reduced his engine's power. He gave up the lead to his teammate Massa, but was far enough ahead of Toyota's Jarno Trulli, to secure second place and eight points.^[37]

Räikkönen qualified third at the British Grand Prix.^[38] Before the race, Räikkönen pushed noted photographer Paul-Henri Cahier to the ground as he lined up a close-up shot. Raikkönen's manager Steve Robertson claimed the driver was provoked by Cahier touching him with his lens and standing on his belongings, but Cahier disputed this version of events.^[39][40] The race was in wet conditions and Räikkönen stayed third at the first corner behind Hamilton and Kovalainen. He kept pace and got up to second when Kovalainen spun. He then chased after Hamilton, and set the fastest lap as he drew up directly behind the McLaren. During the first pitstop, Ferrari did not change the intermediates on his car in the hope that the track would become dry. However, the track was hit by another shower, and Räikkönen rapidly lost pace, and dropped down to sixth before finally pitting for new tyres. He finished fourth, a lap down.

At the German Grand Prix, Räikkönen qualified sixth and dropped down a place at the first corner. He was running fifth when the safety car came out after a crash involving Timo Glock. His teammate Felipe Massa was ahead of him on the track, and as a result, Räikkönen was forced to wait behind Massa when the pitlane opened. This dropped him down to 12th, but he eventually finished in sixth.

At the Hungarian Grand Prix, Räikkönen again qualified sixth. He lost a position to Alonso at the beginning of the race but managed to finish third owing to Hamilton's tyre puncture, passing Alonso during the pitstops and Massa's retirement after an engine failure.

Räikkönen at the 2008 Belgian Grand Prix, where he crashed on the penultimate lap after a duel with Lewis Hamilton.

During the European Grand Prix, Räikkönen qualified fourth and lost a place at the start to Kovalainen. He stayed fifth until the second round of pitstops when he exited before the fuel hose was properly disengaged from his car and left one of the mechanics with a fractured toe.^[41] Two laps later, he suffered a similar engine failure to Massa in the previous race; a connecting rod in his engine broke and he was forced to retire.^[42]

At the Belgian Grand Prix, Räikkönen again qualified fourth. He passed Kovalainen and Massa at the start to be second, and took the lead from Hamilton on the second lap. He pulled away, setting the fastest lap of the race and built a five second gap. He looked set to win but owing to a late-race rain shower, Hamilton closed right up to him and tried to pass him at the final chicane with two laps to go. Hamilton cut the chicane and rejoined ahead of Räikkönen. He let Räikkönen take the place back. Hamilton then repassed him for the lead. The two battled on for the rest of the lap, with Räikkönen retaking the lead when the two stumbled upon spinning backmarker Nico Rosberg, forcing Hamilton onto the grass. Räikkönen spun at the next corner and fell behind Hamilton again. While trying to catch up, he lost control of the car, smashed into a wall and retired.

At the Italian Grand Prix, which was held in extremely wet conditions, Räikkönen qualified 14th. He stayed in 14th position for the first two stints. He climbed to ninth position in the third and last stint in which he also set the fastest lap of the race.

In Singapore, the first night-time event in Formula One history, Räikkönen qualified third behind Massa and Hamilton. He remained in this position for most of the early laps. On lap 14, Nelson Piquet, Jr.'s Renault hit the wall at turn 17 and the safety car was deployed. Both Ferrari drivers pitted during the safety car period, with Räikkönen queued behind Massa in a busy pitlane. Ferrari released Massa before the fuel hose was disconnected from the car, which compromised Räikkönen who rejoined in 16th. Räikkönen managed to climb to fifth place, but on lap 57, while attacking Timo Glock, he hit the wall after pushing too hard at turn 10 and retired.^[43][44] He set the fastest lap of the race as his tenth of the season. This equalled Michael Schumacher's 2004 record of ten fastest laps in a Formula One season.^[45]