1 //
2 // Copyright (C) 2009 The Android Open Source Project
3 //
4 // Licensed under the Apache License, Version 2.0 (the "License");
5 // you may not use this file except in compliance with the License.
6 // You may obtain a copy of the License at
7 //
8 // http://www.apache.org/licenses/LICENSE-2.0
9 //
10 // Unless required by applicable law or agreed to in writing, software
11 // distributed under the License is distributed on an "AS IS" BASIS,
12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 // See the License for the specific language governing permissions and
14 // limitations under the License.
15 //
16
17 #include "update_engine/common/http_fetcher.h"
18
19 #include <base/bind.h>
20
21 using base::Closure;
22 using brillo::MessageLoop;
23 using std::deque;
24 using std::string;
25
26 namespace chromeos_update_engine {
27
~HttpFetcher()28 HttpFetcher::~HttpFetcher() {
29 CancelProxyResolution();
30 }
31
SetPostData(const void * data,size_t size,HttpContentType type)32 void HttpFetcher::SetPostData(const void* data, size_t size,
33 HttpContentType type) {
34 post_data_set_ = true;
35 post_data_.clear();
36 const char* char_data = reinterpret_cast<const char*>(data);
37 post_data_.insert(post_data_.end(), char_data, char_data + size);
38 post_content_type_ = type;
39 }
40
SetPostData(const void * data,size_t size)41 void HttpFetcher::SetPostData(const void* data, size_t size) {
42 SetPostData(data, size, kHttpContentTypeUnspecified);
43 }
44
45 // Proxy methods to set the proxies, then to pop them off.
ResolveProxiesForUrl(const string & url,const Closure & callback)46 bool HttpFetcher::ResolveProxiesForUrl(const string& url,
47 const Closure& callback) {
48 CHECK_EQ(static_cast<Closure*>(nullptr), callback_.get());
49 callback_.reset(new Closure(callback));
50
51 if (!proxy_resolver_) {
52 LOG(INFO) << "Not resolving proxies (no proxy resolver).";
53 no_resolver_idle_id_ = MessageLoop::current()->PostTask(
54 FROM_HERE,
55 base::Bind(&HttpFetcher::NoProxyResolverCallback,
56 base::Unretained(this)));
57 return true;
58 }
59 proxy_request_ = proxy_resolver_->GetProxiesForUrl(
60 url, base::Bind(&HttpFetcher::ProxiesResolved, base::Unretained(this)));
61 if (proxy_request_ == kProxyRequestIdNull) {
62 callback_.reset();
63 return false;
64 }
65 return true;
66 }
67
NoProxyResolverCallback()68 void HttpFetcher::NoProxyResolverCallback() {
69 no_resolver_idle_id_ = MessageLoop::kTaskIdNull;
70 ProxiesResolved(deque<string>());
71 }
72
ProxiesResolved(const deque<string> & proxies)73 void HttpFetcher::ProxiesResolved(const deque<string>& proxies) {
74 proxy_request_ = kProxyRequestIdNull;
75 if (!proxies.empty())
76 SetProxies(proxies);
77 CHECK(callback_.get()) << "ProxiesResolved but none pending.";
78 Closure* callback = callback_.release();
79 // This may indirectly call back into ResolveProxiesForUrl():
80 callback->Run();
81 delete callback;
82 }
83
CancelProxyResolution()84 bool HttpFetcher::CancelProxyResolution() {
85 bool ret = false;
86 if (no_resolver_idle_id_ != MessageLoop::kTaskIdNull) {
87 ret = MessageLoop::current()->CancelTask(no_resolver_idle_id_);
88 no_resolver_idle_id_ = MessageLoop::kTaskIdNull;
89 }
90 if (proxy_request_ && proxy_resolver_) {
91 ret = proxy_resolver_->CancelProxyRequest(proxy_request_) || ret;
92 proxy_request_ = kProxyRequestIdNull;
93 }
94 return ret;
95 }
96
97 } // namespace chromeos_update_engine
98