blob: d8df8fe0c4ccbc5dbce372253783f5438524f785 [file] [log] [blame]
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <string>
#include <vector>
#include "base/debug/leak_tracker.h"
#include "base/logging.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/strings/string16.h"
#include "base/supports_user_data.h"
#include "base/threading/non_thread_safe.h"
#include "base/time/time.h"
#include "net/base/auth.h"
#include "net/base/completion_callback.h"
#include "net/base/load_states.h"
#include "net/base/load_timing_info.h"
#include "net/base/net_export.h"
#include "net/base/net_log.h"
#include "net/base/network_delegate.h"
#include "net/base/request_priority.h"
#include "net/base/upload_progress.h"
#include "net/cookies/canonical_cookie.h"
#include "net/cookies/cookie_store.h"
#include "net/http/http_request_headers.h"
#include "net/http/http_response_info.h"
#include "net/url_request/url_request_status.h"
#include "url/gurl.h"
namespace base {
class Value;
namespace debug {
class StackTrace;
} // namespace debug
} // namespace base
// Temporary layering violation to allow existing users of a deprecated
// interface.
namespace content {
class AppCacheInterceptor;
namespace net {
class CookieOptions;
class HostPortPair;
class IOBuffer;
struct LoadTimingInfo;
struct RedirectInfo;
class SSLCertRequestInfo;
class SSLInfo;
class UploadDataStream;
class URLRequestContext;
class URLRequestJob;
class X509Certificate;
// This stores the values of the Set-Cookie headers received during the request.
// Each item in the vector corresponds to a Set-Cookie: line received,
// excluding the "Set-Cookie:" part.
typedef std::vector<std::string> ResponseCookies;
// A class representing the asynchronous load of a data stream from an URL.
// The lifetime of an instance of this class is completely controlled by the
// consumer, and the instance is not required to live on the heap or be
// allocated in any special way. It is also valid to delete an URLRequest
// object during the handling of a callback to its delegate. Of course, once
// the URLRequest is deleted, no further callbacks to its delegate will occur.
// NOTE: All usage of all instances of this class should be on the same thread.
class NET_EXPORT URLRequest : NON_EXPORTED_BASE(public base::NonThreadSafe),
public base::SupportsUserData {
// Callback function implemented by protocol handlers to create new jobs.
// The factory may return NULL to indicate an error, which will cause other
// factories to be queried. If no factory handles the request, then the
// default job will be used.
typedef URLRequestJob* (ProtocolFactory)(URLRequest* request,
NetworkDelegate* network_delegate,
const std::string& scheme);
// HTTP request/response header IDs (via some preprocessor fun) for use with
// SetRequestHeaderById and GetResponseHeaderById.
enum {
#define HTTP_ATOM(x) HTTP_ ## x,
#include "net/http/http_atom_list.h"
#undef HTTP_ATOM
// Referrer policies (see set_referrer_policy): During server redirects, the
// referrer header might be cleared, if the protocol changes from HTTPS to
// HTTP. This is the default behavior of URLRequest, corresponding to
// referrer policy can be set to never change the referrer header. This
// behavior corresponds to NEVER_CLEAR_REFERRER. Embedders will want to use
// NEVER_CLEAR_REFERRER when implementing the meta-referrer support
// ( and sending requests with a
// non-default referrer policy. Only the default referrer policy requires
// the referrer to be cleared on transitions from HTTPS to HTTP.
enum ReferrerPolicy {
// First-party URL redirect policy: During server redirects, the first-party
// URL for cookies normally doesn't change. However, if the request is a
// top-level first-party request, the first-party URL should be updated to the
// URL on every redirect.
enum FirstPartyURLPolicy {
// This class handles network interception. Use with
// (Un)RegisterRequestInterceptor.
class NET_EXPORT Interceptor {
virtual ~Interceptor() {}
// Called for every request made. Should return a new job to handle the
// request if it should be intercepted, or NULL to allow the request to
// be handled in the normal manner.
virtual URLRequestJob* MaybeIntercept(
URLRequest* request, NetworkDelegate* network_delegate) = 0;
// Called after having received a redirect response, but prior to the
// the request delegate being informed of the redirect. Can return a new
// job to replace the existing job if it should be intercepted, or NULL
// to allow the normal handling to continue. If a new job is provided,
// the delegate never sees the original redirect response, instead the
// response produced by the intercept job will be returned.
virtual URLRequestJob* MaybeInterceptRedirect(
URLRequest* request,
NetworkDelegate* network_delegate,
const GURL& location);
// Called after having received a final response, but prior to the
// the request delegate being informed of the response. This is also
// called when there is no server response at all to allow interception
// on dns or network errors. Can return a new job to replace the existing
// job if it should be intercepted, or NULL to allow the normal handling to
// continue. If a new job is provided, the delegate never sees the original
// response, instead the response produced by the intercept job will be
// returned.
virtual URLRequestJob* MaybeInterceptResponse(
URLRequest* request, NetworkDelegate* network_delegate);
// Deprecated interfaces in net::URLRequest. They have been moved to
// URLRequest's private section to prevent new uses. Existing uses are
// explicitly friended here and should be removed over time.
class NET_EXPORT Deprecated {
// TODO(willchan): Kill off these friend declarations.
friend class TestInterceptor;
friend class content::AppCacheInterceptor;
// TODO(pauljensen): Remove this when AppCacheInterceptor is a
// ProtocolHandler, see
static void RegisterRequestInterceptor(Interceptor* interceptor);
static void UnregisterRequestInterceptor(Interceptor* interceptor);
// The delegate's methods are called from the message loop of the thread
// on which the request's Start() method is called. See above for the
// ordering of callbacks.
// The callbacks will be called in the following order:
// Start()
// - OnCertificateRequested* (zero or more calls, if the SSL server and/or
// SSL proxy requests a client certificate for authentication)
// - OnSSLCertificateError* (zero or one call, if the SSL server's
// certificate has an error)
// - OnReceivedRedirect* (zero or more calls, for the number of redirects)
// - OnAuthRequired* (zero or more calls, for the number of
// authentication failures)
// - OnResponseStarted
// Read() initiated by delegate
// - OnReadCompleted* (zero or more calls until all data is read)
// Read() must be called at least once. Read() returns true when it completed
// immediately, and false if an IO is pending or if there is an error. When
// Read() returns false, the caller can check the Request's status() to see
// if an error occurred, or if the IO is just pending. When Read() returns
// true with zero bytes read, it indicates the end of the response.
class NET_EXPORT Delegate {
// Called upon receiving a redirect. The delegate may call the request's
// Cancel method to prevent the redirect from being followed. Since there
// may be multiple chained redirects, there may also be more than one
// redirect call.
// When this function is called, the request will still contain the
// original URL, the destination of the redirect is provided in 'new_url'.
// If the delegate does not cancel the request and |*defer_redirect| is
// false, then the redirect will be followed, and the request's URL will be
// changed to the new URL. Otherwise if the delegate does not cancel the
// request and |*defer_redirect| is true, then the redirect will be
// followed once FollowDeferredRedirect is called on the URLRequest.
// The caller must set |*defer_redirect| to false, so that delegates do not
// need to set it if they are happy with the default behavior of not
// deferring redirect.
virtual void OnReceivedRedirect(URLRequest* request,
const RedirectInfo& redirect_info,
bool* defer_redirect);
// Called when we receive an authentication failure. The delegate should
// call request->SetAuth() with the user's credentials once it obtains them,
// or request->CancelAuth() to cancel the login and display the error page.
// When it does so, the request will be reissued, restarting the sequence
// of On* callbacks.
virtual void OnAuthRequired(URLRequest* request,
AuthChallengeInfo* auth_info);
// Called when we receive an SSL CertificateRequest message for client
// authentication. The delegate should call
// request->ContinueWithCertificate() with the client certificate the user
// selected, or request->ContinueWithCertificate(NULL) to continue the SSL
// handshake without a client certificate.
virtual void OnCertificateRequested(
URLRequest* request,
SSLCertRequestInfo* cert_request_info);
// Called when using SSL and the server responds with a certificate with
// an error, for example, whose common name does not match the common name
// we were expecting for that host. The delegate should either do the
// safe thing and Cancel() the request or decide to proceed by calling
// ContinueDespiteLastError(). cert_error is a ERR_* error code
// indicating what's wrong with the certificate.
// If |fatal| is true then the host in question demands a higher level
// of security (due e.g. to HTTP Strict Transport Security, user
// preference, or built-in policy). In this case, errors must not be
// bypassable by the user.
virtual void OnSSLCertificateError(URLRequest* request,
const SSLInfo& ssl_info,
bool fatal);
// Called to notify that the request must use the network to complete the
// request and is about to do so. This is called at most once per
// URLRequest, and by default does not defer. If deferred, call
// ResumeNetworkStart() to continue or Cancel() to cancel.
virtual void OnBeforeNetworkStart(URLRequest* request, bool* defer);
// After calling Start(), the delegate will receive an OnResponseStarted
// callback when the request has completed. If an error occurred, the
// request->status() will be set. On success, all redirects have been
// followed and the final response is beginning to arrive. At this point,
// meta data about the response is available, including for example HTTP
// response headers if this is a request for a HTTP resource.
virtual void OnResponseStarted(URLRequest* request) = 0;
// Called when the a Read of the response body is completed after an
// IO_PENDING status from a Read() call.
// The data read is filled into the buffer which the caller passed
// to Read() previously.
// If an error occurred, request->status() will contain the error,
// and bytes read will be -1.
virtual void OnReadCompleted(URLRequest* request, int bytes_read) = 0;
virtual ~Delegate() {}
// If destroyed after Start() has been called but while IO is pending,
// then the request will be effectively canceled and the delegate
// will not have any more of its methods called.
virtual ~URLRequest();
// Changes the default cookie policy from allowing all cookies to blocking all
// cookies. Embedders that want to implement a more flexible policy should
// change the default to blocking all cookies, and provide a NetworkDelegate
// with the URLRequestContext that maintains the CookieStore.
// The cookie policy default has to be set before the first URLRequest is
// started. Once it was set to block all cookies, it cannot be changed back.
static void SetDefaultCookiePolicyToBlock();
// Returns true if the scheme can be handled by URLRequest. False otherwise.
static bool IsHandledProtocol(const std::string& scheme);
// Returns true if the url can be handled by URLRequest. False otherwise.
// The function returns true for invalid urls because URLRequest knows how
// to handle those.
// NOTE: This will also return true for URLs that are handled by
// ProtocolFactories that only work for requests that are scoped to a
// Profile.
static bool IsHandledURL(const GURL& url);
// The original url is the url used to initialize the request, and it may
// differ from the url if the request was redirected.
const GURL& original_url() const { return url_chain_.front(); }
// The chain of urls traversed by this request. If the request had no
// redirects, this vector will contain one element.
const std::vector<GURL>& url_chain() const { return url_chain_; }
const GURL& url() const { return url_chain_.back(); }
// The URL that should be consulted for the third-party cookie blocking
// policy.
// WARNING: This URL must only be used for the third-party cookie blocking
// policy. It MUST NEVER be used for any kind of SECURITY check.
// For example, if a top-level navigation is redirected, the
// first-party for cookies will be the URL of the first URL in the
// redirect chain throughout the whole redirect. If it was used for
// a security check, an attacker might try to get around this check
// by starting from some page that redirects to the
// host-to-be-attacked.
const GURL& first_party_for_cookies() const {
return first_party_for_cookies_;
// This method may only be called before Start().
void set_first_party_for_cookies(const GURL& first_party_for_cookies);
// The first-party URL policy to apply when updating the first party URL
// during redirects. The first-party URL policy may only be changed before
// Start() is called.
FirstPartyURLPolicy first_party_url_policy() const {
return first_party_url_policy_;
void set_first_party_url_policy(FirstPartyURLPolicy first_party_url_policy);
// The request method, as an uppercase string. "GET" is the default value.
// The request method may only be changed before Start() is called and
// should only be assigned an uppercase value.
const std::string& method() const { return method_; }
void set_method(const std::string& method);
// Determines the new method of the request afer following a redirect.
// |method| is the method used to arrive at the redirect,
// |http_status_code| is the status code associated with the redirect.
static std::string ComputeMethodForRedirect(const std::string& method,
int http_status_code);
// The referrer URL for the request. This header may actually be suppressed
// from the underlying network request for security reasons (e.g., a HTTPS
// URL will not be sent as the referrer for a HTTP request). The referrer
// may only be changed before Start() is called.
const std::string& referrer() const { return referrer_; }
// Referrer is sanitized to remove URL fragment, user name and password.
void SetReferrer(const std::string& referrer);
// The referrer policy to apply when updating the referrer during redirects.
// The referrer policy may only be changed before Start() is called.
ReferrerPolicy referrer_policy() const { return referrer_policy_; }
void set_referrer_policy(ReferrerPolicy referrer_policy);
// Sets the delegate of the request. This value may be changed at any time,
// and it is permissible for it to be null.
void set_delegate(Delegate* delegate);
// Indicates that the request body should be sent using chunked transfer
// encoding. This method may only be called before Start() is called.
void EnableChunkedUpload();
// Appends the given bytes to the request's upload data to be sent
// immediately via chunked transfer encoding. When all data has been sent,
// call MarkEndOfChunks() to indicate the end of upload data.
// This method may be called only after calling EnableChunkedUpload().
void AppendChunkToUpload(const char* bytes,
int bytes_len,
bool is_last_chunk);
// Sets the upload data.
void set_upload(scoped_ptr<UploadDataStream> upload);
// Gets the upload data.
const UploadDataStream* get_upload() const;
// Returns true if the request has a non-empty message body to upload.
bool has_upload() const;
// Set an extra request header by ID or name, or remove one by name. These
// methods may only be called before Start() is called, or before a new
// redirect in the request chain.
void SetExtraRequestHeaderById(int header_id, const std::string& value,
bool overwrite);
void SetExtraRequestHeaderByName(const std::string& name,
const std::string& value, bool overwrite);
void RemoveRequestHeaderByName(const std::string& name);
// Sets all extra request headers. Any extra request headers set by other
// methods are overwritten by this method. This method may only be called
// before Start() is called. It is an error to call it later.
void SetExtraRequestHeaders(const HttpRequestHeaders& headers);
const HttpRequestHeaders& extra_request_headers() const {
return extra_request_headers_;
// Gets the full request headers sent to the server.
// Return true and overwrites headers if it can get the request headers;
// otherwise, returns false and does not modify headers. (Always returns
// false for request types that don't have headers, like file requests.)
// This is guaranteed to succeed if:
// 1. A redirect or auth callback is currently running. Once it ends, the
// headers may become unavailable as a new request with the new address
// or credentials is made.
// 2. The OnResponseStarted callback is currently running or has run.
bool GetFullRequestHeaders(HttpRequestHeaders* headers) const;
// Gets the total amount of data received from network after SSL decoding and
// proxy handling.
int64 GetTotalReceivedBytes() const;
// Returns the current load state for the request. The returned value's
// |param| field is an optional parameter describing details related to the
// load state. Not all load states have a parameter.
LoadStateWithParam GetLoadState() const;
// Returns a partial representation of the request's state as a value, for
// debugging. Caller takes ownership of returned value.
base::Value* GetStateAsValue() const;
// Logs information about the what external object currently blocking the
// request. LogUnblocked must be called before resuming the request. This
// can be called multiple times in a row either with or without calling
// LogUnblocked between calls. |blocked_by| must not be NULL or have length
// 0.
void LogBlockedBy(const char* blocked_by);
// Just like LogBlockedBy, but also makes GetLoadState return source as the
// |param| in the value returned by GetLoadState. Calling LogUnblocked or
// LogBlockedBy will clear the load param. |blocked_by| must not be NULL or
// have length 0.
void LogAndReportBlockedBy(const char* blocked_by);
// Logs that the request is no longer blocked by the last caller to
// LogBlockedBy.
void LogUnblocked();
// Returns the current upload progress in bytes. When the upload data is
// chunked, size is set to zero, but position will not be.
UploadProgress GetUploadProgress() const;
// Get response header(s) by ID or name. These methods may only be called
// once the delegate's OnResponseStarted method has been called. Headers
// that appear more than once in the response are coalesced, with values
// separated by commas (per RFC 2616). This will not work with cookies since
// comma can be used in cookie values.
// TODO(darin): add API to enumerate response headers.
void GetResponseHeaderById(int header_id, std::string* value);
void GetResponseHeaderByName(const std::string& name, std::string* value);
// Get all response headers, \n-delimited and \n\0-terminated. This includes
// the response status line. Restrictions on GetResponseHeaders apply.
void GetAllResponseHeaders(std::string* headers);
// The time when |this| was constructed.
base::TimeTicks creation_time() const { return creation_time_; }
// The time at which the returned response was requested. For cached
// responses, this is the last time the cache entry was validated.
const base::Time& request_time() const {
return response_info_.request_time;
// The time at which the returned response was generated. For cached
// responses, this is the last time the cache entry was validated.
const base::Time& response_time() const {
return response_info_.response_time;
// Indicate if this response was fetched from disk cache.
bool was_cached() const { return response_info_.was_cached; }
// Returns true if the URLRequest was delivered through a proxy.
bool was_fetched_via_proxy() const {
return response_info_.was_fetched_via_proxy;
// Returns true if the URLRequest was delivered over SPDY.
bool was_fetched_via_spdy() const {
return response_info_.was_fetched_via_spdy;
// Returns the host and port that the content was fetched from. See
// http_response_info.h for caveats relating to cached content.
HostPortPair GetSocketAddress() const;
// Get all response headers, as a HttpResponseHeaders object. See comments
// in HttpResponseHeaders class as to the format of the data.
HttpResponseHeaders* response_headers() const;
// Get the SSL connection info.
const SSLInfo& ssl_info() const {
return response_info_.ssl_info;
// Gets timing information related to the request. Events that have not yet
// occurred are left uninitialized. After a second request starts, due to
// a redirect or authentication, values will be reset.
// LoadTimingInfo only contains ConnectTiming information and socket IDs for
// non-cached HTTP responses.
void GetLoadTimingInfo(LoadTimingInfo* load_timing_info) const;
// Returns the cookie values included in the response, if the request is one
// that can have cookies. Returns true if the request is a cookie-bearing
// type, false otherwise. This method may only be called once the
// delegate's OnResponseStarted method has been called.
bool GetResponseCookies(ResponseCookies* cookies);
// Get the mime type. This method may only be called once the delegate's
// OnResponseStarted method has been called.
void GetMimeType(std::string* mime_type) const;
// Get the charset (character encoding). This method may only be called once
// the delegate's OnResponseStarted method has been called.
void GetCharset(std::string* charset) const;
// Returns the HTTP response code (e.g., 200, 404, and so on). This method
// may only be called once the delegate's OnResponseStarted method has been
// called. For non-HTTP requests, this method returns -1.
int GetResponseCode() const;
// Get the HTTP response info in its entirety.
const HttpResponseInfo& response_info() const { return response_info_; }
// Access the LOAD_* flags modifying this request (see load_flags.h).
int load_flags() const { return load_flags_; }
// The new flags may change the IGNORE_LIMITS flag only when called
// before Start() is called, it must only set the flag, and if set,
// the priority of this request must already be MAXIMUM_PRIORITY.
void SetLoadFlags(int flags);
// Returns true if the request is "pending" (i.e., if Start() has been called,
// and the response has not yet been called).
bool is_pending() const { return is_pending_; }
// Returns true if the request is in the process of redirecting to a new
// URL but has not yet initiated the new request.
bool is_redirecting() const { return is_redirecting_; }
// Returns the error status of the request.
const URLRequestStatus& status() const { return status_; }
// Returns a globally unique identifier for this request.
uint64 identifier() const { return identifier_; }
// This method is called to start the request. The delegate will receive
// a OnResponseStarted callback when the request is started.
void Start();
// This method may be called at any time after Start() has been called to
// cancel the request. This method may be called many times, and it has
// no effect once the response has completed. It is guaranteed that no
// methods of the delegate will be called after the request has been
// cancelled, except that this may call the delegate's OnReadCompleted()
// during the call to Cancel itself.
void Cancel();
// Cancels the request and sets the error to |error| (see net_error_list.h
// for values).
void CancelWithError(int error);
// Cancels the request and sets the error to |error| (see net_error_list.h
// for values) and attaches |ssl_info| as the SSLInfo for that request. This
// is useful to attach a certificate and certificate error to a canceled
// request.
void CancelWithSSLError(int error, const SSLInfo& ssl_info);
// Read initiates an asynchronous read from the response, and must only
// be called after the OnResponseStarted callback is received with a
// successful status.
// If data is available, Read will return true, and the data and length will
// be returned immediately. If data is not available, Read returns false,
// and an asynchronous Read is initiated. The Read is finished when
// the caller receives the OnReadComplete callback. Unless the request was
// cancelled, OnReadComplete will always be called, even if the read failed.
// The buf parameter is a buffer to receive the data. If the operation
// completes asynchronously, the implementation will reference the buffer
// until OnReadComplete is called. The buffer must be at least max_bytes in
// length.
// The max_bytes parameter is the maximum number of bytes to read.
// The bytes_read parameter is an output parameter containing the
// the number of bytes read. A value of 0 indicates that there is no
// more data available to read from the stream.
// If a read error occurs, Read returns false and the request->status
// will be set to an error.
bool Read(IOBuffer* buf, int max_bytes, int* bytes_read);
// If this request is being cached by the HTTP cache, stop subsequent caching.
// Note that this method has no effect on other (simultaneous or not) requests
// for the same resource. The typical example is a request that results in
// the data being stored to disk (downloaded instead of rendered) so we don't
// want to store it twice.
void StopCaching();
// This method may be called to follow a redirect that was deferred in
// response to an OnReceivedRedirect call.
void FollowDeferredRedirect();
// This method must be called to resume network communications that were
// deferred in response to an OnBeforeNetworkStart call.
void ResumeNetworkStart();
// One of the following two methods should be called in response to an
// OnAuthRequired() callback (and only then).
// SetAuth will reissue the request with the given credentials.
// CancelAuth will give up and display the error page.
void SetAuth(const AuthCredentials& credentials);
void CancelAuth();
// This method can be called after the user selects a client certificate to
// instruct this URLRequest to continue with the request with the
// certificate. Pass NULL if the user doesn't have a client certificate.
void ContinueWithCertificate(X509Certificate* client_cert);
// This method can be called after some error notifications to instruct this
// URLRequest to ignore the current error and continue with the request. To
// cancel the request instead, call Cancel().
void ContinueDespiteLastError();
// Used to specify the context (cookie store, cache) for this request.
const URLRequestContext* context() const;
const BoundNetLog& net_log() const { return net_log_; }
// Returns the expected content size if available
int64 GetExpectedContentSize() const;
// Returns the priority level for this request.
RequestPriority priority() const { return priority_; }
// Sets the priority level for this request and any related
// jobs. Must not change the priority to anything other than
// MAXIMUM_PRIORITY if the IGNORE_LIMITS load flag is set.
void SetPriority(RequestPriority priority);
// Returns true iff this request would be internally redirected to HTTPS
// due to HSTS. If so, |redirect_url| is rewritten to the new HTTPS URL.
bool GetHSTSRedirect(GURL* redirect_url) const;
// TODO(willchan): Undo this. Only temporarily public.
bool has_delegate() const { return delegate_ != NULL; }
// NOTE(willchan): This is just temporary for debugging
// Allows to setting debug info into the URLRequest.
void set_stack_trace(const base::debug::StackTrace& stack_trace);
const base::debug::StackTrace* stack_trace() const;
void set_received_response_content_length(int64 received_content_length) {
received_response_content_length_ = received_content_length;
int64 received_response_content_length() const {
return received_response_content_length_;
// Available at NetworkDelegate::NotifyHeadersReceived() time, which is before
// the more general response_info() is available, even though it is a subset.
const HostPortPair& proxy_server() const {
return proxy_server_;
// Allow the URLRequestJob class to control the is_pending() flag.
void set_is_pending(bool value) { is_pending_ = value; }
// Allow the URLRequestJob class to set our status too
void set_status(const URLRequestStatus& value) { status_ = value; }
CookieStore* cookie_store() const { return cookie_store_.get(); }
// Allow the URLRequestJob to redirect this request. Returns OK if
// successful, otherwise an error code is returned.
int Redirect(const RedirectInfo& redirect_info);
// Called by URLRequestJob to allow interception when a redirect occurs.
void NotifyReceivedRedirect(const RedirectInfo& redirect_info,
bool* defer_redirect);
// Called by URLRequestHttpJob (note, only HTTP(S) jobs will call this) to
// allow deferral of network initialization.
void NotifyBeforeNetworkStart(bool* defer);
// Allow an interceptor's URLRequestJob to restart this request.
// Should only be called if the original job has not started a response.
void Restart();
friend class URLRequestJob;
friend class URLRequestContext;
// URLRequests are always created by calling URLRequestContext::CreateRequest.
// If no cookie store or network delegate are passed in, will use the ones
// from the URLRequestContext.
URLRequest(const GURL& url,
RequestPriority priority,
Delegate* delegate,
const URLRequestContext* context,
CookieStore* cookie_store,
NetworkDelegate* network_delegate);
// Registers or unregisters a network interception class.
static void RegisterRequestInterceptor(Interceptor* interceptor);
static void UnregisterRequestInterceptor(Interceptor* interceptor);
// Resumes or blocks a request paused by the NetworkDelegate::OnBeforeRequest
// handler. If |blocked| is true, the request is blocked and an error page is
// returned indicating so. This should only be called after Start is called
// and OnBeforeRequest returns true (signalling that the request should be
// paused).
void BeforeRequestComplete(int error);
void StartJob(URLRequestJob* job);
// Restarting involves replacing the current job with a new one such as what
// happens when following a HTTP redirect.
void RestartWithJob(URLRequestJob* job);
void PrepareToRestart();
// Detaches the job from this request in preparation for this object going
// away or the job being replaced. The job will not call us back when it has
// been orphaned.
void OrphanJob();
// Cancels the request and set the error and ssl info for this request to the
// passed values.
void DoCancel(int error, const SSLInfo& ssl_info);
// Called by the URLRequestJob when the headers are received, before any other
// method, to allow caching of load timing information.
void OnHeadersComplete();
// Notifies the network delegate that the request has been completed.
// This does not imply a successful completion. Also a canceled request is
// considered completed.
void NotifyRequestCompleted();
// Called by URLRequestJob to allow interception when the final response
// occurs.
void NotifyResponseStarted();
// These functions delegate to |delegate_| and may only be used if
// |delegate_| is not NULL. See URLRequest::Delegate for the meaning
// of these functions.
void NotifyAuthRequired(AuthChallengeInfo* auth_info);
void NotifyAuthRequiredComplete(NetworkDelegate::AuthRequiredResponse result);
void NotifyCertificateRequested(SSLCertRequestInfo* cert_request_info);
void NotifySSLCertificateError(const SSLInfo& ssl_info, bool fatal);
void NotifyReadCompleted(int bytes_read);
// These functions delegate to |network_delegate_| if it is not NULL.
// If |network_delegate_| is NULL, cookies can be used unless
// SetDefaultCookiePolicyToBlock() has been called.
bool CanGetCookies(const CookieList& cookie_list) const;
bool CanSetCookie(const std::string& cookie_line,
CookieOptions* options) const;
bool CanEnablePrivacyMode() const;
// Called just before calling a delegate that may block a request.
void OnCallToDelegate();
// Called when the delegate lets a request continue. Also called on
// cancellation.
void OnCallToDelegateComplete();
// Contextual information used for this request. Cannot be NULL. This contains
// most of the dependencies which are shared between requests (disk cache,
// cookie store, socket pool, etc.)
const URLRequestContext* context_;
NetworkDelegate* network_delegate_;
// Tracks the time spent in various load states throughout this request.
BoundNetLog net_log_;
scoped_refptr<URLRequestJob> job_;
scoped_ptr<UploadDataStream> upload_data_stream_;
std::vector<GURL> url_chain_;
GURL first_party_for_cookies_;
GURL delegate_redirect_url_;
std::string method_; // "GET", "POST", etc. Should be all uppercase.
std::string referrer_;
ReferrerPolicy referrer_policy_;
FirstPartyURLPolicy first_party_url_policy_;
HttpRequestHeaders extra_request_headers_;
int load_flags_; // Flags indicating the request type for the load;
// expected values are LOAD_* enums above.
// Never access methods of the |delegate_| directly. Always use the
// Notify... methods for this.
Delegate* delegate_;
// Current error status of the job. When no error has been encountered, this
// will be SUCCESS. If multiple errors have been encountered, this will be
// the first non-SUCCESS status seen.
URLRequestStatus status_;
// The HTTP response info, lazily initialized.
HttpResponseInfo response_info_;
// Tells us whether the job is outstanding. This is true from the time
// Start() is called to the time we dispatch RequestComplete and indicates
// whether the job is active.
bool is_pending_;
// Indicates if the request is in the process of redirecting to a new
// location. It is true from the time the headers complete until a
// new request begins.
bool is_redirecting_;
// Number of times we're willing to redirect. Used to guard against
// infinite redirects.
int redirect_limit_;
// Cached value for use after we've orphaned the job handling the
// first transaction in a request involving redirects.
UploadProgress final_upload_progress_;
// The priority level for this request. Objects like
// ClientSocketPool use this to determine which URLRequest to
// allocate sockets to first.
RequestPriority priority_;
// TODO(battre): The only consumer of the identifier_ is currently the
// web request API. We need to match identifiers of requests between the
// web request API and the web navigation API. As the URLRequest does not
// exist when the web navigation API is triggered, the tracking probably
// needs to be done outside of the URLRequest anyway. Therefore, this
// identifier should be deleted here.
// A globally unique identifier for this request.
const uint64 identifier_;
// True if this request is currently calling a delegate, or is blocked waiting
// for the URL request or network delegate to resume it.
bool calling_delegate_;
// An optional parameter that provides additional information about what
// |this| is currently being blocked by.
std::string blocked_by_;
bool use_blocked_by_as_load_param_;
base::debug::LeakTracker<URLRequest> leak_tracker_;
// Callback passed to the network delegate to notify us when a blocked request
// is ready to be resumed or canceled.
CompletionCallback before_request_callback_;
// Safe-guard to ensure that we do not send multiple "I am completed"
// messages to network delegate.
// TODO(battre): Remove this.
bool has_notified_completion_;
// Authentication data used by the NetworkDelegate for this request,
// if one is present. |auth_credentials_| may be filled in when calling
// |NotifyAuthRequired| on the NetworkDelegate. |auth_info_| holds
// the authentication challenge being handled by |NotifyAuthRequired|.
AuthCredentials auth_credentials_;
scoped_refptr<AuthChallengeInfo> auth_info_;
int64 received_response_content_length_;
base::TimeTicks creation_time_;
// Timing information for the most recent request. Its start times are
// populated during Start(), and the rest are populated in OnResponseReceived.
LoadTimingInfo load_timing_info_;
scoped_ptr<const base::debug::StackTrace> stack_trace_;
// Keeps track of whether or not OnBeforeNetworkStart has been called yet.
bool notified_before_network_start_;
// The cookie store to be used for this request.
scoped_refptr<CookieStore> cookie_store_;
// The proxy server used for this request, if any.
HostPortPair proxy_server_;
} // namespace net