goldberg_emulator/dll/steam_http.h
2019-04-13 12:21:56 -04:00

152 lines
9.4 KiB
C++

/* Copyright (C) 2019 Mr Goldberg
This file is part of the Goldberg Emulator
The Goldberg Emulator is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
The Goldberg Emulator is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the Goldberg Emulator; if not, see
<http://www.gnu.org/licenses/>. */
#include "base.h"
struct Steam_Http_Request {
HTTPRequestHandle handle;
uint64 context_value;
std::string response;
};
class Steam_HTTP : public ISteamHTTP
{
class Settings *settings;
class Networking *network;
class SteamCallResults *callback_results;
class SteamCallBacks *callbacks;
std::vector<Steam_Http_Request> requests;
Steam_Http_Request *get_request(HTTPRequestHandle hRequest);
public:
Steam_HTTP(class Settings *settings, class Networking *network, class SteamCallResults *callback_results, class SteamCallBacks *callbacks);
// Initializes a new HTTP request, returning a handle to use in further operations on it. Requires
// the method (GET or POST) and the absolute URL for the request. Both http and https are supported,
// so this string must start with http:// or https:// and should look like http://store.steampowered.com/app/250/
// or such.
HTTPRequestHandle CreateHTTPRequest( EHTTPMethod eHTTPRequestMethod, const char *pchAbsoluteURL );
// Set a context value for the request, which will be returned in the HTTPRequestCompleted_t callback after
// sending the request. This is just so the caller can easily keep track of which callbacks go with which request data.
bool SetHTTPRequestContextValue( HTTPRequestHandle hRequest, uint64 ulContextValue );
// Set a timeout in seconds for the HTTP request, must be called prior to sending the request. Default
// timeout is 60 seconds if you don't call this. Returns false if the handle is invalid, or the request
// has already been sent.
bool SetHTTPRequestNetworkActivityTimeout( HTTPRequestHandle hRequest, uint32 unTimeoutSeconds );
// Set a request header value for the request, must be called prior to sending the request. Will
// return false if the handle is invalid or the request is already sent.
bool SetHTTPRequestHeaderValue( HTTPRequestHandle hRequest, const char *pchHeaderName, const char *pchHeaderValue );
// Set a GET or POST parameter value on the request, which is set will depend on the EHTTPMethod specified
// when creating the request. Must be called prior to sending the request. Will return false if the
// handle is invalid or the request is already sent.
bool SetHTTPRequestGetOrPostParameter( HTTPRequestHandle hRequest, const char *pchParamName, const char *pchParamValue );
// Sends the HTTP request, will return false on a bad handle, otherwise use SteamCallHandle to wait on
// asynchronous response via callback.
//
// Note: If the user is in offline mode in Steam, then this will add a only-if-cached cache-control
// header and only do a local cache lookup rather than sending any actual remote request.
bool SendHTTPRequest( HTTPRequestHandle hRequest, SteamAPICall_t *pCallHandle );
// Sends the HTTP request, will return false on a bad handle, otherwise use SteamCallHandle to wait on
// asynchronous response via callback for completion, and listen for HTTPRequestHeadersReceived_t and
// HTTPRequestDataReceived_t callbacks while streaming.
bool SendHTTPRequestAndStreamResponse( HTTPRequestHandle hRequest, SteamAPICall_t *pCallHandle );
// Defers a request you have sent, the actual HTTP client code may have many requests queued, and this will move
// the specified request to the tail of the queue. Returns false on invalid handle, or if the request is not yet sent.
bool DeferHTTPRequest( HTTPRequestHandle hRequest );
// Prioritizes a request you have sent, the actual HTTP client code may have many requests queued, and this will move
// the specified request to the head of the queue. Returns false on invalid handle, or if the request is not yet sent.
bool PrioritizeHTTPRequest( HTTPRequestHandle hRequest );
// Checks if a response header is present in a HTTP response given a handle from HTTPRequestCompleted_t, also
// returns the size of the header value if present so the caller and allocate a correctly sized buffer for
// GetHTTPResponseHeaderValue.
bool GetHTTPResponseHeaderSize( HTTPRequestHandle hRequest, const char *pchHeaderName, uint32 *unResponseHeaderSize );
// Gets header values from a HTTP response given a handle from HTTPRequestCompleted_t, will return false if the
// header is not present or if your buffer is too small to contain it's value. You should first call
// BGetHTTPResponseHeaderSize to check for the presence of the header and to find out the size buffer needed.
bool GetHTTPResponseHeaderValue( HTTPRequestHandle hRequest, const char *pchHeaderName, uint8 *pHeaderValueBuffer, uint32 unBufferSize );
// Gets the size of the body data from a HTTP response given a handle from HTTPRequestCompleted_t, will return false if the
// handle is invalid.
bool GetHTTPResponseBodySize( HTTPRequestHandle hRequest, uint32 *unBodySize );
// Gets the body data from a HTTP response given a handle from HTTPRequestCompleted_t, will return false if the
// 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
// the correct buffer size to use.
bool GetHTTPResponseBodyData( HTTPRequestHandle hRequest, uint8 *pBodyDataBuffer, uint32 unBufferSize );
// Gets the body data from a streaming HTTP response given a handle from HTTPRequestDataReceived_t. Will return false if the
// handle is invalid or is to a non-streaming response (meaning it wasn't sent with SendHTTPRequestAndStreamResponse), or if the buffer size and offset
// do not match the size and offset sent in HTTPRequestDataReceived_t.
bool GetHTTPStreamingResponseBodyData( HTTPRequestHandle hRequest, uint32 cOffset, uint8 *pBodyDataBuffer, uint32 unBufferSize );
// Releases an HTTP response handle, should always be called to free resources after receiving a HTTPRequestCompleted_t
// callback and finishing using the response.
bool ReleaseHTTPRequest( HTTPRequestHandle hRequest );
// Gets progress on downloading the body for the request. This will be zero unless a response header has already been
// received which included a content-length field. For responses that contain no content-length it will report
// zero for the duration of the request as the size is unknown until the connection closes.
bool GetHTTPDownloadProgressPct( HTTPRequestHandle hRequest, float *pflPercentOut );
// Sets the body for an HTTP Post request. Will fail and return false on a GET request, and will fail if POST params
// have already been set for the request. Setting this raw body makes it the only contents for the post, the pchContentType
// parameter will set the content-type header for the request so the server may know how to interpret the body.
bool SetHTTPRequestRawPostBody( HTTPRequestHandle hRequest, const char *pchContentType, uint8 *pubBody, uint32 unBodyLen );
// Creates a cookie container handle which you must later free with ReleaseCookieContainer(). If bAllowResponsesToModify=true
// than any response to your requests using this cookie container may add new cookies which may be transmitted with
// future requests. If bAllowResponsesToModify=false than only cookies you explicitly set will be sent. This API is just for
// during process lifetime, after steam restarts no cookies are persisted and you have no way to access the cookie container across
// repeat executions of your process.
HTTPCookieContainerHandle CreateCookieContainer( bool bAllowResponsesToModify );
// Release a cookie container you are finished using, freeing it's memory
bool ReleaseCookieContainer( HTTPCookieContainerHandle hCookieContainer );
// Adds a cookie to the specified cookie container that will be used with future requests.
bool SetCookie( HTTPCookieContainerHandle hCookieContainer, const char *pchHost, const char *pchUrl, const char *pchCookie );
// Set the cookie container to use for a HTTP request
bool SetHTTPRequestCookieContainer( HTTPRequestHandle hRequest, HTTPCookieContainerHandle hCookieContainer );
// 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
bool SetHTTPRequestUserAgentInfo( HTTPRequestHandle hRequest, const char *pchUserAgentInfo );
// Set that https request should require verified SSL certificate via machines certificate trust store
bool SetHTTPRequestRequiresVerifiedCertificate( HTTPRequestHandle hRequest, bool bRequireVerifiedCertificate );
// Set an absolute timeout on the HTTP request, this is just a total time timeout different than the network activity timeout
// which can bump everytime we get more data
bool SetHTTPRequestAbsoluteTimeoutMS( HTTPRequestHandle hRequest, uint32 unMilliseconds );
// Check if the reason the request failed was because we timed it out (rather than some harder failure)
bool GetHTTPRequestWasTimedOut( HTTPRequestHandle hRequest, bool *pbWasTimedOut );
};