Index: webrtc/base/httpclient.cc |
diff --git a/webrtc/base/httpclient.cc b/webrtc/base/httpclient.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..a458590bdb6406adc1509700cbd7092f897ae0b2 |
--- /dev/null |
+++ b/webrtc/base/httpclient.cc |
@@ -0,0 +1,835 @@ |
+/* |
+ * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
+ * |
+ * Use of this source code is governed by a BSD-style license |
+ * that can be found in the LICENSE file in the root of the source |
+ * tree. An additional intellectual property rights grant can be found |
+ * in the file PATENTS. All contributing project authors may |
+ * be found in the AUTHORS file in the root of the source tree. |
+ */ |
+ |
+#include <time.h> |
+#include <algorithm> |
+#include <memory> |
+#include "webrtc/base/asyncsocket.h" |
+#include "webrtc/base/common.h" |
+#include "webrtc/base/diskcache.h" |
+#include "webrtc/base/httpclient.h" |
+#include "webrtc/base/httpcommon-inl.h" |
+#include "webrtc/base/logging.h" |
+#include "webrtc/base/pathutils.h" |
+#include "webrtc/base/socketstream.h" |
+#include "webrtc/base/stringencode.h" |
+#include "webrtc/base/stringutils.h" |
+#include "webrtc/base/thread.h" |
+ |
+namespace rtc { |
+ |
+////////////////////////////////////////////////////////////////////// |
+// Helpers |
+////////////////////////////////////////////////////////////////////// |
+ |
+namespace { |
+ |
+const size_t kCacheHeader = 0; |
+const size_t kCacheBody = 1; |
+ |
+// Convert decimal string to integer |
+bool HttpStringToUInt(const std::string& str, size_t* val) { |
+ ASSERT(NULL != val); |
+ char* eos = NULL; |
+ *val = strtoul(str.c_str(), &eos, 10); |
+ return (*eos == '\0'); |
+} |
+ |
+bool HttpShouldCache(const HttpTransaction& t) { |
+ bool verb_allows_cache = (t.request.verb == HV_GET) |
+ || (t.request.verb == HV_HEAD); |
+ bool is_range_response = t.response.hasHeader(HH_CONTENT_RANGE, NULL); |
+ bool has_expires = t.response.hasHeader(HH_EXPIRES, NULL); |
+ bool request_allows_cache = |
+ has_expires || (std::string::npos != t.request.path.find('?')); |
+ bool response_allows_cache = |
+ has_expires || HttpCodeIsCacheable(t.response.scode); |
+ |
+ bool may_cache = verb_allows_cache |
+ && request_allows_cache |
+ && response_allows_cache |
+ && !is_range_response; |
+ |
+ std::string value; |
+ if (t.response.hasHeader(HH_CACHE_CONTROL, &value)) { |
+ HttpAttributeList directives; |
+ HttpParseAttributes(value.data(), value.size(), directives); |
+ // Response Directives Summary: |
+ // public - always cacheable |
+ // private - do not cache in a shared cache |
+ // no-cache - may cache, but must revalidate whether fresh or stale |
+ // no-store - sensitive information, do not cache or store in any way |
+ // max-age - supplants Expires for staleness |
+ // s-maxage - use as max-age for shared caches, ignore otherwise |
+ // must-revalidate - may cache, but must revalidate after stale |
+ // proxy-revalidate - shared cache must revalidate |
+ if (HttpHasAttribute(directives, "no-store", NULL)) { |
+ may_cache = false; |
+ } else if (HttpHasAttribute(directives, "public", NULL)) { |
+ may_cache = true; |
+ } |
+ } |
+ return may_cache; |
+} |
+ |
+enum HttpCacheState { |
+ HCS_FRESH, // In cache, may use |
+ HCS_STALE, // In cache, must revalidate |
+ HCS_NONE // Not in cache |
+}; |
+ |
+HttpCacheState HttpGetCacheState(const HttpTransaction& t) { |
+ // Temporaries |
+ std::string s_temp; |
+ time_t u_temp; |
+ |
+ // Current time |
+ time_t now = time(0); |
+ |
+ HttpAttributeList cache_control; |
+ if (t.response.hasHeader(HH_CACHE_CONTROL, &s_temp)) { |
+ HttpParseAttributes(s_temp.data(), s_temp.size(), cache_control); |
+ } |
+ |
+ // Compute age of cache document |
+ time_t date; |
+ if (!t.response.hasHeader(HH_DATE, &s_temp) |
+ || !HttpDateToSeconds(s_temp, &date)) |
+ return HCS_NONE; |
+ |
+ // TODO: Timestamp when cache request sent and response received? |
+ time_t request_time = date; |
+ time_t response_time = date; |
+ |
+ time_t apparent_age = 0; |
+ if (response_time > date) { |
+ apparent_age = response_time - date; |
+ } |
+ |
+ time_t corrected_received_age = apparent_age; |
+ size_t i_temp; |
+ if (t.response.hasHeader(HH_AGE, &s_temp) |
+ && HttpStringToUInt(s_temp, (&i_temp))) { |
+ u_temp = static_cast<time_t>(i_temp); |
+ corrected_received_age = std::max(apparent_age, u_temp); |
+ } |
+ |
+ time_t response_delay = response_time - request_time; |
+ time_t corrected_initial_age = corrected_received_age + response_delay; |
+ time_t resident_time = now - response_time; |
+ time_t current_age = corrected_initial_age + resident_time; |
+ |
+ // Compute lifetime of document |
+ time_t lifetime; |
+ if (HttpHasAttribute(cache_control, "max-age", &s_temp)) { |
+ lifetime = atoi(s_temp.c_str()); |
+ } else if (t.response.hasHeader(HH_EXPIRES, &s_temp) |
+ && HttpDateToSeconds(s_temp, &u_temp)) { |
+ lifetime = u_temp - date; |
+ } else if (t.response.hasHeader(HH_LAST_MODIFIED, &s_temp) |
+ && HttpDateToSeconds(s_temp, &u_temp)) { |
+ // TODO: Issue warning 113 if age > 24 hours |
+ lifetime = static_cast<size_t>(now - u_temp) / 10; |
+ } else { |
+ return HCS_STALE; |
+ } |
+ |
+ return (lifetime > current_age) ? HCS_FRESH : HCS_STALE; |
+} |
+ |
+enum HttpValidatorStrength { |
+ HVS_NONE, |
+ HVS_WEAK, |
+ HVS_STRONG |
+}; |
+ |
+HttpValidatorStrength |
+HttpRequestValidatorLevel(const HttpRequestData& request) { |
+ if (HV_GET != request.verb) |
+ return HVS_STRONG; |
+ return request.hasHeader(HH_RANGE, NULL) ? HVS_STRONG : HVS_WEAK; |
+} |
+ |
+HttpValidatorStrength |
+HttpResponseValidatorLevel(const HttpResponseData& response) { |
+ std::string value; |
+ if (response.hasHeader(HH_ETAG, &value)) { |
+ bool is_weak = (strnicmp(value.c_str(), "W/", 2) == 0); |
+ return is_weak ? HVS_WEAK : HVS_STRONG; |
+ } |
+ if (response.hasHeader(HH_LAST_MODIFIED, &value)) { |
+ time_t last_modified, date; |
+ if (HttpDateToSeconds(value, &last_modified) |
+ && response.hasHeader(HH_DATE, &value) |
+ && HttpDateToSeconds(value, &date) |
+ && (last_modified + 60 < date)) { |
+ return HVS_STRONG; |
+ } |
+ return HVS_WEAK; |
+ } |
+ return HVS_NONE; |
+} |
+ |
+std::string GetCacheID(const HttpRequestData& request) { |
+ std::string id, url; |
+ id.append(ToString(request.verb)); |
+ id.append("_"); |
+ request.getAbsoluteUri(&url); |
+ id.append(url); |
+ return id; |
+} |
+ |
+} // anonymous namespace |
+ |
+////////////////////////////////////////////////////////////////////// |
+// Public Helpers |
+////////////////////////////////////////////////////////////////////// |
+ |
+bool HttpWriteCacheHeaders(const HttpResponseData* response, |
+ StreamInterface* output, size_t* size) { |
+ size_t length = 0; |
+ // Write all unknown and end-to-end headers to a cache file |
+ for (HttpData::const_iterator it = response->begin(); |
+ it != response->end(); ++it) { |
+ HttpHeader header; |
+ if (FromString(header, it->first) && !HttpHeaderIsEndToEnd(header)) |
+ continue; |
+ length += it->first.length() + 2 + it->second.length() + 2; |
+ if (!output) |
+ continue; |
+ std::string formatted_header(it->first); |
+ formatted_header.append(": "); |
+ formatted_header.append(it->second); |
+ formatted_header.append("\r\n"); |
+ StreamResult result = output->WriteAll(formatted_header.data(), |
+ formatted_header.length(), |
+ NULL, NULL); |
+ if (SR_SUCCESS != result) { |
+ return false; |
+ } |
+ } |
+ if (output && (SR_SUCCESS != output->WriteAll("\r\n", 2, NULL, NULL))) { |
+ return false; |
+ } |
+ length += 2; |
+ if (size) |
+ *size = length; |
+ return true; |
+} |
+ |
+bool HttpReadCacheHeaders(StreamInterface* input, HttpResponseData* response, |
+ HttpData::HeaderCombine combine) { |
+ while (true) { |
+ std::string formatted_header; |
+ StreamResult result = input->ReadLine(&formatted_header); |
+ if ((SR_EOS == result) || (1 == formatted_header.size())) { |
+ break; |
+ } |
+ if (SR_SUCCESS != result) { |
+ return false; |
+ } |
+ size_t end_of_name = formatted_header.find(':'); |
+ if (std::string::npos == end_of_name) { |
+ LOG_F(LS_WARNING) << "Malformed cache header"; |
+ continue; |
+ } |
+ size_t start_of_value = end_of_name + 1; |
+ size_t end_of_value = formatted_header.length(); |
+ while ((start_of_value < end_of_value) |
+ && isspace(formatted_header[start_of_value])) |
+ ++start_of_value; |
+ while ((start_of_value < end_of_value) |
+ && isspace(formatted_header[end_of_value-1])) |
+ --end_of_value; |
+ size_t value_length = end_of_value - start_of_value; |
+ |
+ std::string name(formatted_header.substr(0, end_of_name)); |
+ std::string value(formatted_header.substr(start_of_value, value_length)); |
+ response->changeHeader(name, value, combine); |
+ } |
+ return true; |
+} |
+ |
+////////////////////////////////////////////////////////////////////// |
+// HttpClient |
+////////////////////////////////////////////////////////////////////// |
+ |
+const size_t kDefaultRetries = 1; |
+const size_t kMaxRedirects = 5; |
+ |
+HttpClient::HttpClient(const std::string& agent, StreamPool* pool, |
+ HttpTransaction* transaction) |
+ : agent_(agent), pool_(pool), |
+ transaction_(transaction), free_transaction_(false), |
+ retries_(kDefaultRetries), attempt_(0), redirects_(0), |
+ redirect_action_(REDIRECT_DEFAULT), |
+ uri_form_(URI_DEFAULT), cache_(NULL), cache_state_(CS_READY), |
+ resolver_(NULL) { |
+ base_.notify(this); |
+ if (NULL == transaction_) { |
+ free_transaction_ = true; |
+ transaction_ = new HttpTransaction; |
+ } |
+} |
+ |
+HttpClient::~HttpClient() { |
+ base_.notify(NULL); |
+ base_.abort(HE_SHUTDOWN); |
+ if (resolver_) { |
+ resolver_->Destroy(false); |
+ } |
+ release(); |
+ if (free_transaction_) |
+ delete transaction_; |
+} |
+ |
+void HttpClient::reset() { |
+ server_.Clear(); |
+ request().clear(true); |
+ response().clear(true); |
+ context_.reset(); |
+ redirects_ = 0; |
+ base_.abort(HE_OPERATION_CANCELLED); |
+} |
+ |
+void HttpClient::OnResolveResult(AsyncResolverInterface* resolver) { |
+ if (resolver != resolver_) { |
+ return; |
+ } |
+ int error = resolver_->GetError(); |
+ server_ = resolver_->address(); |
+ resolver_->Destroy(false); |
+ resolver_ = NULL; |
+ if (error != 0) { |
+ LOG(LS_ERROR) << "Error " << error << " resolving name: " |
+ << server_; |
+ onHttpComplete(HM_CONNECT, HE_CONNECT_FAILED); |
+ } else { |
+ connect(); |
+ } |
+} |
+ |
+void HttpClient::StartDNSLookup() { |
+ resolver_ = new AsyncResolver(); |
+ resolver_->SignalDone.connect(this, &HttpClient::OnResolveResult); |
+ resolver_->Start(server_); |
+} |
+ |
+void HttpClient::set_server(const SocketAddress& address) { |
+ server_ = address; |
+ // Setting 'Host' here allows it to be overridden before starting the request, |
+ // if necessary. |
+ request().setHeader(HH_HOST, HttpAddress(server_, false), true); |
+} |
+ |
+StreamInterface* HttpClient::GetDocumentStream() { |
+ return base_.GetDocumentStream(); |
+} |
+ |
+void HttpClient::start() { |
+ if (base_.mode() != HM_NONE) { |
+ // call reset() to abort an in-progress request |
+ ASSERT(false); |
+ return; |
+ } |
+ |
+ ASSERT(!IsCacheActive()); |
+ |
+ if (request().hasHeader(HH_TRANSFER_ENCODING, NULL)) { |
+ // Exact size must be known on the client. Instead of using chunked |
+ // encoding, wrap data with auto-caching file or memory stream. |
+ ASSERT(false); |
+ return; |
+ } |
+ |
+ attempt_ = 0; |
+ |
+ // If no content has been specified, using length of 0. |
+ request().setHeader(HH_CONTENT_LENGTH, "0", false); |
+ |
+ if (!agent_.empty()) { |
+ request().setHeader(HH_USER_AGENT, agent_, false); |
+ } |
+ |
+ UriForm uri_form = uri_form_; |
+ if (PROXY_HTTPS == proxy_.type) { |
+ // Proxies require absolute form |
+ uri_form = URI_ABSOLUTE; |
+ request().version = HVER_1_0; |
+ request().setHeader(HH_PROXY_CONNECTION, "Keep-Alive", false); |
+ } else { |
+ request().setHeader(HH_CONNECTION, "Keep-Alive", false); |
+ } |
+ |
+ if (URI_ABSOLUTE == uri_form) { |
+ // Convert to absolute uri form |
+ std::string url; |
+ if (request().getAbsoluteUri(&url)) { |
+ request().path = url; |
+ } else { |
+ LOG(LS_WARNING) << "Couldn't obtain absolute uri"; |
+ } |
+ } else if (URI_RELATIVE == uri_form) { |
+ // Convert to relative uri form |
+ std::string host, path; |
+ if (request().getRelativeUri(&host, &path)) { |
+ request().setHeader(HH_HOST, host); |
+ request().path = path; |
+ } else { |
+ LOG(LS_WARNING) << "Couldn't obtain relative uri"; |
+ } |
+ } |
+ |
+ if ((NULL != cache_) && CheckCache()) { |
+ return; |
+ } |
+ |
+ connect(); |
+} |
+ |
+void HttpClient::connect() { |
+ int stream_err; |
+ if (server_.IsUnresolvedIP()) { |
+ StartDNSLookup(); |
+ return; |
+ } |
+ StreamInterface* stream = pool_->RequestConnectedStream(server_, &stream_err); |
+ if (stream == NULL) { |
+ ASSERT(0 != stream_err); |
+ LOG(LS_ERROR) << "RequestConnectedStream error: " << stream_err; |
+ onHttpComplete(HM_CONNECT, HE_CONNECT_FAILED); |
+ } else { |
+ base_.attach(stream); |
+ if (stream->GetState() == SS_OPEN) { |
+ base_.send(&transaction_->request); |
+ } |
+ } |
+} |
+ |
+void HttpClient::prepare_get(const std::string& url) { |
+ reset(); |
+ Url<char> purl(url); |
+ set_server(SocketAddress(purl.host(), purl.port())); |
+ request().verb = HV_GET; |
+ request().path = purl.full_path(); |
+} |
+ |
+void HttpClient::prepare_post(const std::string& url, |
+ const std::string& content_type, |
+ StreamInterface* request_doc) { |
+ reset(); |
+ Url<char> purl(url); |
+ set_server(SocketAddress(purl.host(), purl.port())); |
+ request().verb = HV_POST; |
+ request().path = purl.full_path(); |
+ request().setContent(content_type, request_doc); |
+} |
+ |
+void HttpClient::release() { |
+ if (StreamInterface* stream = base_.detach()) { |
+ pool_->ReturnConnectedStream(stream); |
+ } |
+} |
+ |
+bool HttpClient::ShouldRedirect(std::string* location) const { |
+ // TODO: Unittest redirection. |
+ if ((REDIRECT_NEVER == redirect_action_) |
+ || !HttpCodeIsRedirection(response().scode) |
+ || !response().hasHeader(HH_LOCATION, location) |
+ || (redirects_ >= kMaxRedirects)) |
+ return false; |
+ return (REDIRECT_ALWAYS == redirect_action_) |
+ || (HC_SEE_OTHER == response().scode) |
+ || (HV_HEAD == request().verb) |
+ || (HV_GET == request().verb); |
+} |
+ |
+bool HttpClient::BeginCacheFile() { |
+ ASSERT(NULL != cache_); |
+ ASSERT(CS_READY == cache_state_); |
+ |
+ std::string id = GetCacheID(request()); |
+ CacheLock lock(cache_, id, true); |
+ if (!lock.IsLocked()) { |
+ LOG_F(LS_WARNING) << "Couldn't lock cache"; |
+ return false; |
+ } |
+ |
+ if (HE_NONE != WriteCacheHeaders(id)) { |
+ return false; |
+ } |
+ |
+ std::unique_ptr<StreamInterface> stream( |
+ cache_->WriteResource(id, kCacheBody)); |
+ if (!stream) { |
+ LOG_F(LS_ERROR) << "Couldn't open body cache"; |
+ return false; |
+ } |
+ lock.Commit(); |
+ |
+ // Let's secretly replace the response document with Folgers Crystals, |
+ // er, StreamTap, so that we can mirror the data to our cache. |
+ StreamInterface* output = response().document.release(); |
+ if (!output) { |
+ output = new NullStream; |
+ } |
+ StreamTap* tap = new StreamTap(output, stream.release()); |
+ response().document.reset(tap); |
+ return true; |
+} |
+ |
+HttpError HttpClient::WriteCacheHeaders(const std::string& id) { |
+ std::unique_ptr<StreamInterface> stream( |
+ cache_->WriteResource(id, kCacheHeader)); |
+ if (!stream) { |
+ LOG_F(LS_ERROR) << "Couldn't open header cache"; |
+ return HE_CACHE; |
+ } |
+ |
+ if (!HttpWriteCacheHeaders(&transaction_->response, stream.get(), NULL)) { |
+ LOG_F(LS_ERROR) << "Couldn't write header cache"; |
+ return HE_CACHE; |
+ } |
+ |
+ return HE_NONE; |
+} |
+ |
+void HttpClient::CompleteCacheFile() { |
+ // Restore previous response document |
+ StreamTap* tap = static_cast<StreamTap*>(response().document.release()); |
+ response().document.reset(tap->Detach()); |
+ |
+ int error; |
+ StreamResult result = tap->GetTapResult(&error); |
+ |
+ // Delete the tap and cache stream (which completes cache unlock) |
+ delete tap; |
+ |
+ if (SR_SUCCESS != result) { |
+ LOG(LS_ERROR) << "Cache file error: " << error; |
+ cache_->DeleteResource(GetCacheID(request())); |
+ } |
+} |
+ |
+bool HttpClient::CheckCache() { |
+ ASSERT(NULL != cache_); |
+ ASSERT(CS_READY == cache_state_); |
+ |
+ std::string id = GetCacheID(request()); |
+ if (!cache_->HasResource(id)) { |
+ // No cache file available |
+ return false; |
+ } |
+ |
+ HttpError error = ReadCacheHeaders(id, true); |
+ |
+ if (HE_NONE == error) { |
+ switch (HttpGetCacheState(*transaction_)) { |
+ case HCS_FRESH: |
+ // Cache content is good, read from cache |
+ break; |
+ case HCS_STALE: |
+ // Cache content may be acceptable. Issue a validation request. |
+ if (PrepareValidate()) { |
+ return false; |
+ } |
+ // Couldn't validate, fall through. |
+ FALLTHROUGH(); |
+ case HCS_NONE: |
+ // Cache content is not useable. Issue a regular request. |
+ response().clear(false); |
+ return false; |
+ } |
+ } |
+ |
+ if (HE_NONE == error) { |
+ error = ReadCacheBody(id); |
+ cache_state_ = CS_READY; |
+ } |
+ |
+ if (HE_CACHE == error) { |
+ LOG_F(LS_WARNING) << "Cache failure, continuing with normal request"; |
+ response().clear(false); |
+ return false; |
+ } |
+ |
+ SignalHttpClientComplete(this, error); |
+ return true; |
+} |
+ |
+HttpError HttpClient::ReadCacheHeaders(const std::string& id, bool override) { |
+ std::unique_ptr<StreamInterface> stream( |
+ cache_->ReadResource(id, kCacheHeader)); |
+ if (!stream) { |
+ return HE_CACHE; |
+ } |
+ |
+ HttpData::HeaderCombine combine = |
+ override ? HttpData::HC_REPLACE : HttpData::HC_AUTO; |
+ |
+ if (!HttpReadCacheHeaders(stream.get(), &transaction_->response, combine)) { |
+ LOG_F(LS_ERROR) << "Error reading cache headers"; |
+ return HE_CACHE; |
+ } |
+ |
+ response().scode = HC_OK; |
+ return HE_NONE; |
+} |
+ |
+HttpError HttpClient::ReadCacheBody(const std::string& id) { |
+ cache_state_ = CS_READING; |
+ |
+ HttpError error = HE_NONE; |
+ |
+ size_t data_size; |
+ std::unique_ptr<StreamInterface> stream(cache_->ReadResource(id, kCacheBody)); |
+ if (!stream || !stream->GetAvailable(&data_size)) { |
+ LOG_F(LS_ERROR) << "Unavailable cache body"; |
+ error = HE_CACHE; |
+ } else { |
+ error = OnHeaderAvailable(false, false, data_size); |
+ } |
+ |
+ if ((HE_NONE == error) |
+ && (HV_HEAD != request().verb) |
+ && response().document) { |
+ // Allocate on heap to not explode the stack. |
+ const int array_size = 1024 * 64; |
+ std::unique_ptr<char[]> buffer(new char[array_size]); |
+ StreamResult result = Flow(stream.get(), buffer.get(), array_size, |
+ response().document.get()); |
+ if (SR_SUCCESS != result) { |
+ error = HE_STREAM; |
+ } |
+ } |
+ |
+ return error; |
+} |
+ |
+bool HttpClient::PrepareValidate() { |
+ ASSERT(CS_READY == cache_state_); |
+ // At this point, request() contains the pending request, and response() |
+ // contains the cached response headers. Reformat the request to validate |
+ // the cached content. |
+ HttpValidatorStrength vs_required = HttpRequestValidatorLevel(request()); |
+ HttpValidatorStrength vs_available = HttpResponseValidatorLevel(response()); |
+ if (vs_available < vs_required) { |
+ return false; |
+ } |
+ std::string value; |
+ if (response().hasHeader(HH_ETAG, &value)) { |
+ request().addHeader(HH_IF_NONE_MATCH, value); |
+ } |
+ if (response().hasHeader(HH_LAST_MODIFIED, &value)) { |
+ request().addHeader(HH_IF_MODIFIED_SINCE, value); |
+ } |
+ response().clear(false); |
+ cache_state_ = CS_VALIDATING; |
+ return true; |
+} |
+ |
+HttpError HttpClient::CompleteValidate() { |
+ ASSERT(CS_VALIDATING == cache_state_); |
+ |
+ std::string id = GetCacheID(request()); |
+ |
+ // Merge cached headers with new headers |
+ HttpError error = ReadCacheHeaders(id, false); |
+ if (HE_NONE != error) { |
+ // Rewrite merged headers to cache |
+ CacheLock lock(cache_, id); |
+ error = WriteCacheHeaders(id); |
+ } |
+ if (HE_NONE != error) { |
+ error = ReadCacheBody(id); |
+ } |
+ return error; |
+} |
+ |
+HttpError HttpClient::OnHeaderAvailable(bool ignore_data, bool chunked, |
+ size_t data_size) { |
+ // If we are ignoring the data, this is an intermediate header. |
+ // TODO: don't signal intermediate headers. Instead, do all header-dependent |
+ // processing now, and either set up the next request, or fail outright. |
+ // TODO: by default, only write response documents with a success code. |
+ SignalHeaderAvailable(this, !ignore_data, ignore_data ? 0 : data_size); |
+ if (!ignore_data && !chunked && (data_size != SIZE_UNKNOWN) |
+ && response().document) { |
+ // Attempt to pre-allocate space for the downloaded data. |
+ if (!response().document->ReserveSize(data_size)) { |
+ return HE_OVERFLOW; |
+ } |
+ } |
+ return HE_NONE; |
+} |
+ |
+// |
+// HttpBase Implementation |
+// |
+ |
+HttpError HttpClient::onHttpHeaderComplete(bool chunked, size_t& data_size) { |
+ if (CS_VALIDATING == cache_state_) { |
+ if (HC_NOT_MODIFIED == response().scode) { |
+ return CompleteValidate(); |
+ } |
+ // Should we remove conditional headers from request? |
+ cache_state_ = CS_READY; |
+ cache_->DeleteResource(GetCacheID(request())); |
+ // Continue processing response as normal |
+ } |
+ |
+ ASSERT(!IsCacheActive()); |
+ if ((request().verb == HV_HEAD) || !HttpCodeHasBody(response().scode)) { |
+ // HEAD requests and certain response codes contain no body |
+ data_size = 0; |
+ } |
+ if (ShouldRedirect(NULL) |
+ || ((HC_PROXY_AUTHENTICATION_REQUIRED == response().scode) |
+ && (PROXY_HTTPS == proxy_.type))) { |
+ // We're going to issue another request, so ignore the incoming data. |
+ base_.set_ignore_data(true); |
+ } |
+ |
+ HttpError error = OnHeaderAvailable(base_.ignore_data(), chunked, data_size); |
+ if (HE_NONE != error) { |
+ return error; |
+ } |
+ |
+ if ((NULL != cache_) |
+ && !base_.ignore_data() |
+ && HttpShouldCache(*transaction_)) { |
+ if (BeginCacheFile()) { |
+ cache_state_ = CS_WRITING; |
+ } |
+ } |
+ return HE_NONE; |
+} |
+ |
+void HttpClient::onHttpComplete(HttpMode mode, HttpError err) { |
+ if (((HE_DISCONNECTED == err) || (HE_CONNECT_FAILED == err) |
+ || (HE_SOCKET_ERROR == err)) |
+ && (HC_INTERNAL_SERVER_ERROR == response().scode) |
+ && (attempt_ < retries_)) { |
+ // If the response code has not changed from the default, then we haven't |
+ // received anything meaningful from the server, so we are eligible for a |
+ // retry. |
+ ++attempt_; |
+ if (request().document && !request().document->Rewind()) { |
+ // Unable to replay the request document. |
+ err = HE_STREAM; |
+ } else { |
+ release(); |
+ connect(); |
+ return; |
+ } |
+ } else if (err != HE_NONE) { |
+ // fall through |
+ } else if (mode == HM_CONNECT) { |
+ base_.send(&transaction_->request); |
+ return; |
+ } else if ((mode == HM_SEND) || HttpCodeIsInformational(response().scode)) { |
+ // If you're interested in informational headers, catch |
+ // SignalHeaderAvailable. |
+ base_.recv(&transaction_->response); |
+ return; |
+ } else { |
+ if (!HttpShouldKeepAlive(response())) { |
+ LOG(LS_VERBOSE) << "HttpClient: closing socket"; |
+ base_.stream()->Close(); |
+ } |
+ std::string location; |
+ if (ShouldRedirect(&location)) { |
+ Url<char> purl(location); |
+ set_server(SocketAddress(purl.host(), purl.port())); |
+ request().path = purl.full_path(); |
+ if (response().scode == HC_SEE_OTHER) { |
+ request().verb = HV_GET; |
+ request().clearHeader(HH_CONTENT_TYPE); |
+ request().clearHeader(HH_CONTENT_LENGTH); |
+ request().document.reset(); |
+ } else if (request().document && !request().document->Rewind()) { |
+ // Unable to replay the request document. |
+ ASSERT(REDIRECT_ALWAYS == redirect_action_); |
+ err = HE_STREAM; |
+ } |
+ if (err == HE_NONE) { |
+ ++redirects_; |
+ context_.reset(); |
+ response().clear(false); |
+ release(); |
+ start(); |
+ return; |
+ } |
+ } else if ((HC_PROXY_AUTHENTICATION_REQUIRED == response().scode) |
+ && (PROXY_HTTPS == proxy_.type)) { |
+ std::string authorization, auth_method; |
+ HttpData::const_iterator begin = response().begin(HH_PROXY_AUTHENTICATE); |
+ HttpData::const_iterator end = response().end(HH_PROXY_AUTHENTICATE); |
+ for (HttpData::const_iterator it = begin; it != end; ++it) { |
+ HttpAuthContext *context = context_.get(); |
+ HttpAuthResult res = HttpAuthenticate( |
+ it->second.data(), it->second.size(), |
+ proxy_.address, |
+ ToString(request().verb), request().path, |
+ proxy_.username, proxy_.password, |
+ context, authorization, auth_method); |
+ context_.reset(context); |
+ if (res == HAR_RESPONSE) { |
+ request().setHeader(HH_PROXY_AUTHORIZATION, authorization); |
+ if (request().document && !request().document->Rewind()) { |
+ err = HE_STREAM; |
+ } else { |
+ // Explicitly do not reset the HttpAuthContext |
+ response().clear(false); |
+ // TODO: Reuse socket when authenticating? |
+ release(); |
+ start(); |
+ return; |
+ } |
+ } else if (res == HAR_IGNORE) { |
+ LOG(INFO) << "Ignoring Proxy-Authenticate: " << auth_method; |
+ continue; |
+ } else { |
+ break; |
+ } |
+ } |
+ } |
+ } |
+ if (CS_WRITING == cache_state_) { |
+ CompleteCacheFile(); |
+ cache_state_ = CS_READY; |
+ } else if (CS_READING == cache_state_) { |
+ cache_state_ = CS_READY; |
+ } |
+ release(); |
+ SignalHttpClientComplete(this, err); |
+} |
+ |
+void HttpClient::onHttpClosed(HttpError err) { |
+ // This shouldn't occur, since we return the stream to the pool upon command |
+ // completion. |
+ ASSERT(false); |
+} |
+ |
+////////////////////////////////////////////////////////////////////// |
+// HttpClientDefault |
+////////////////////////////////////////////////////////////////////// |
+ |
+HttpClientDefault::HttpClientDefault(SocketFactory* factory, |
+ const std::string& agent, |
+ HttpTransaction* transaction) |
+ : ReuseSocketPool(factory ? factory : Thread::Current()->socketserver()), |
+ HttpClient(agent, NULL, transaction) { |
+ set_pool(this); |
+} |
+ |
+////////////////////////////////////////////////////////////////////// |
+ |
+} // namespace rtc |