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210 lines
11 KiB
210 lines
11 KiB
//====== Copyright © 1996-2009, Valve Corporation, All rights reserved. ======= |
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// |
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// Purpose: interface to http client |
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// |
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//============================================================================= |
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#ifndef ISTEAMHTTP_H |
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#define ISTEAMHTTP_H |
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#ifdef _WIN32 |
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#pragma once |
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#endif |
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#include "isteamclient.h" |
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#include "steamhttpenums.h" |
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// Handle to a HTTP Request handle |
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typedef uint32 HTTPRequestHandle; |
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#define INVALID_HTTPREQUEST_HANDLE 0 |
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typedef uint32 HTTPCookieContainerHandle; |
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#define INVALID_HTTPCOOKIE_HANDLE 0 |
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//----------------------------------------------------------------------------- |
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// Purpose: interface to http client |
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//----------------------------------------------------------------------------- |
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class ISteamHTTP |
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{ |
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public: |
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// Initializes a new HTTP request, returning a handle to use in further operations on it. Requires |
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// the method (GET or POST) and the absolute URL for the request. Both http and https are supported, |
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// so this string must start with http:// or https:// and should look like http://store.steampowered.com/app/250/ |
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// or such. |
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virtual HTTPRequestHandle CreateHTTPRequest( EHTTPMethod eHTTPRequestMethod, const char *pchAbsoluteURL ) = 0; |
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// Set a context value for the request, which will be returned in the HTTPRequestCompleted_t callback after |
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// sending the request. This is just so the caller can easily keep track of which callbacks go with which request data. |
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virtual bool SetHTTPRequestContextValue( HTTPRequestHandle hRequest, uint64 ulContextValue ) = 0; |
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// Set a timeout in seconds for the HTTP request, must be called prior to sending the request. Default |
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// timeout is 60 seconds if you don't call this. Returns false if the handle is invalid, or the request |
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// has already been sent. |
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virtual bool SetHTTPRequestNetworkActivityTimeout( HTTPRequestHandle hRequest, uint32 unTimeoutSeconds ) = 0; |
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// Set a request header value for the request, must be called prior to sending the request. Will |
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// return false if the handle is invalid or the request is already sent. |
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virtual bool SetHTTPRequestHeaderValue( HTTPRequestHandle hRequest, const char *pchHeaderName, const char *pchHeaderValue ) = 0; |
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// Set a GET or POST parameter value on the request, which is set will depend on the EHTTPMethod specified |
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// when creating the request. Must be called prior to sending the request. Will return false if the |
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// handle is invalid or the request is already sent. |
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virtual bool SetHTTPRequestGetOrPostParameter( HTTPRequestHandle hRequest, const char *pchParamName, const char *pchParamValue ) = 0; |
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// Sends the HTTP request, will return false on a bad handle, otherwise use SteamCallHandle to wait on |
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// asynchronous response via callback. |
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// |
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// Note: If the user is in offline mode in Steam, then this will add a only-if-cached cache-control |
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// header and only do a local cache lookup rather than sending any actual remote request. |
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virtual bool SendHTTPRequest( HTTPRequestHandle hRequest, SteamAPICall_t *pCallHandle ) = 0; |
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// Sends the HTTP request, will return false on a bad handle, otherwise use SteamCallHandle to wait on |
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// asynchronous response via callback for completion, and listen for HTTPRequestHeadersReceived_t and |
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// HTTPRequestDataReceived_t callbacks while streaming. |
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virtual bool SendHTTPRequestAndStreamResponse( HTTPRequestHandle hRequest, SteamAPICall_t *pCallHandle ) = 0; |
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// Defers a request you have sent, the actual HTTP client code may have many requests queued, and this will move |
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// the specified request to the tail of the queue. Returns false on invalid handle, or if the request is not yet sent. |
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virtual bool DeferHTTPRequest( HTTPRequestHandle hRequest ) = 0; |
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// Prioritizes a request you have sent, the actual HTTP client code may have many requests queued, and this will move |
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// the specified request to the head of the queue. Returns false on invalid handle, or if the request is not yet sent. |
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virtual bool PrioritizeHTTPRequest( HTTPRequestHandle hRequest ) = 0; |
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// Checks if a response header is present in a HTTP response given a handle from HTTPRequestCompleted_t, also |
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// returns the size of the header value if present so the caller and allocate a correctly sized buffer for |
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// GetHTTPResponseHeaderValue. |
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virtual bool GetHTTPResponseHeaderSize( HTTPRequestHandle hRequest, const char *pchHeaderName, uint32 *unResponseHeaderSize ) = 0; |
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// Gets header values from a HTTP response given a handle from HTTPRequestCompleted_t, will return false if the |
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// header is not present or if your buffer is too small to contain it's value. You should first call |
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// BGetHTTPResponseHeaderSize to check for the presence of the header and to find out the size buffer needed. |
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virtual bool GetHTTPResponseHeaderValue( HTTPRequestHandle hRequest, const char *pchHeaderName, uint8 *pHeaderValueBuffer, uint32 unBufferSize ) = 0; |
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// Gets the size of the body data from a HTTP response given a handle from HTTPRequestCompleted_t, will return false if the |
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// handle is invalid. |
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virtual bool GetHTTPResponseBodySize( HTTPRequestHandle hRequest, uint32 *unBodySize ) = 0; |
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// Gets the body data from a HTTP response given a handle from HTTPRequestCompleted_t, will return false if the |
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// handle is invalid or is to a streaming response, or if the provided buffer is not the correct size. Use BGetHTTPResponseBodySize first to find out |
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// the correct buffer size to use. |
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virtual bool GetHTTPResponseBodyData( HTTPRequestHandle hRequest, uint8 *pBodyDataBuffer, uint32 unBufferSize ) = 0; |
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// Gets the body data from a streaming HTTP response given a handle from HTTPRequestDataReceived_t. Will return false if the |
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// handle is invalid or is to a non-streaming response (meaning it wasn't sent with SendHTTPRequestAndStreamResponse), or if the buffer size and offset |
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// do not match the size and offset sent in HTTPRequestDataReceived_t. |
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virtual bool GetHTTPStreamingResponseBodyData( HTTPRequestHandle hRequest, uint32 cOffset, uint8 *pBodyDataBuffer, uint32 unBufferSize ) = 0; |
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// Releases an HTTP response handle, should always be called to free resources after receiving a HTTPRequestCompleted_t |
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// callback and finishing using the response. |
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virtual bool ReleaseHTTPRequest( HTTPRequestHandle hRequest ) = 0; |
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// Gets progress on downloading the body for the request. This will be zero unless a response header has already been |
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// received which included a content-length field. For responses that contain no content-length it will report |
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// zero for the duration of the request as the size is unknown until the connection closes. |
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virtual bool GetHTTPDownloadProgressPct( HTTPRequestHandle hRequest, float *pflPercentOut ) = 0; |
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// Sets the body for an HTTP Post request. Will fail and return false on a GET request, and will fail if POST params |
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// have already been set for the request. Setting this raw body makes it the only contents for the post, the pchContentType |
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// parameter will set the content-type header for the request so the server may know how to interpret the body. |
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virtual bool SetHTTPRequestRawPostBody( HTTPRequestHandle hRequest, const char *pchContentType, uint8 *pubBody, uint32 unBodyLen ) = 0; |
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// Creates a cookie container handle which you must later free with ReleaseCookieContainer(). If bAllowResponsesToModify=true |
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// than any response to your requests using this cookie container may add new cookies which may be transmitted with |
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// future requests. If bAllowResponsesToModify=false than only cookies you explicitly set will be sent. This API is just for |
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// during process lifetime, after steam restarts no cookies are persisted and you have no way to access the cookie container across |
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// repeat executions of your process. |
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virtual HTTPCookieContainerHandle CreateCookieContainer( bool bAllowResponsesToModify ) = 0; |
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// Release a cookie container you are finished using, freeing it's memory |
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virtual bool ReleaseCookieContainer( HTTPCookieContainerHandle hCookieContainer ) = 0; |
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// Adds a cookie to the specified cookie container that will be used with future requests. |
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virtual bool SetCookie( HTTPCookieContainerHandle hCookieContainer, const char *pchHost, const char *pchUrl, const char *pchCookie ) = 0; |
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// Set the cookie container to use for a HTTP request |
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virtual bool SetHTTPRequestCookieContainer( HTTPRequestHandle hRequest, HTTPCookieContainerHandle hCookieContainer ) = 0; |
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// Set the extra user agent info for a request, this doesn't clobber the normal user agent, it just adds the extra info on the end |
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virtual bool SetHTTPRequestUserAgentInfo( HTTPRequestHandle hRequest, const char *pchUserAgentInfo ) = 0; |
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// Set that https request should require verified SSL certificate via machines certificate trust store |
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virtual bool SetHTTPRequestRequiresVerifiedCertificate( HTTPRequestHandle hRequest, bool bRequireVerifiedCertificate ) = 0; |
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// Set an absolute timeout on the HTTP request, this is just a total time timeout different than the network activity timeout |
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// which can bump everytime we get more data |
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virtual bool SetHTTPRequestAbsoluteTimeoutMS( HTTPRequestHandle hRequest, uint32 unMilliseconds ) = 0; |
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// Check if the reason the request failed was because we timed it out (rather than some harder failure) |
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virtual bool GetHTTPRequestWasTimedOut( HTTPRequestHandle hRequest, bool *pbWasTimedOut ) = 0; |
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}; |
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#define STEAMHTTP_INTERFACE_VERSION "STEAMHTTP_INTERFACE_VERSION002" |
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// callbacks |
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#if defined( VALVE_CALLBACK_PACK_SMALL ) |
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#pragma pack( push, 4 ) |
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#elif defined( VALVE_CALLBACK_PACK_LARGE ) |
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#pragma pack( push, 8 ) |
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#else |
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#error isteamclient.h must be included |
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#endif |
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struct HTTPRequestCompleted_t |
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{ |
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enum { k_iCallback = k_iClientHTTPCallbacks + 1 }; |
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// Handle value for the request that has completed. |
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HTTPRequestHandle m_hRequest; |
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// Context value that the user defined on the request that this callback is associated with, 0 if |
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// no context value was set. |
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uint64 m_ulContextValue; |
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// This will be true if we actually got any sort of response from the server (even an error). |
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// It will be false if we failed due to an internal error or client side network failure. |
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bool m_bRequestSuccessful; |
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// Will be the HTTP status code value returned by the server, k_EHTTPStatusCode200OK is the normal |
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// OK response, if you get something else you probably need to treat it as a failure. |
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EHTTPStatusCode m_eStatusCode; |
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uint32 m_unBodySize; // Same as GetHTTPResponseBodySize() |
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}; |
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struct HTTPRequestHeadersReceived_t |
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{ |
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enum { k_iCallback = k_iClientHTTPCallbacks + 2 }; |
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// Handle value for the request that has received headers. |
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HTTPRequestHandle m_hRequest; |
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// Context value that the user defined on the request that this callback is associated with, 0 if |
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// no context value was set. |
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uint64 m_ulContextValue; |
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}; |
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struct HTTPRequestDataReceived_t |
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{ |
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enum { k_iCallback = k_iClientHTTPCallbacks + 3 }; |
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// Handle value for the request that has received data. |
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HTTPRequestHandle m_hRequest; |
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// Context value that the user defined on the request that this callback is associated with, 0 if |
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// no context value was set. |
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uint64 m_ulContextValue; |
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// Offset to provide to GetHTTPStreamingResponseBodyData to get this chunk of data |
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uint32 m_cOffset; |
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// Size to provide to GetHTTPStreamingResponseBodyData to get this chunk of data |
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uint32 m_cBytesReceived; |
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}; |
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#pragma pack( pop ) |
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#endif // ISTEAMHTTP_H
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