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Side by Side Diff: components/payments/content/android/payment_manifest_downloader.cc

Issue 2645813006: Download web payment manifests. (Closed)
Patch Set: At most INT_MAX sections in manifest and fingperints in section Created 3 years, 9 months ago
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1 // Copyright 2017 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "components/payments/content/android/payment_manifest_downloader.h"
6
7 #include <algorithm>
8 #include <unordered_map>
9 #include <utility>
10
11 #include "base/bind.h"
12 #include "base/logging.h"
13 #include "base/strings/string_split.h"
14 #include "components/data_use_measurement/core/data_use_user_data.h"
15 #include "components/link_header_util/link_header_util.h"
16 #include "net/base/load_flags.h"
17 #include "net/http/http_response_headers.h"
18 #include "net/http/http_status_code.h"
19 #include "net/http/http_util.h"
20 #include "net/url_request/url_request_context_getter.h"
21 #include "url/url_constants.h"
22
23 namespace payments {
24 namespace {
25
26 bool IsValidManifestUrl(const GURL& url) {
27 return url.is_valid() && url.SchemeIs(url::kHttpsScheme);
28 }
29
30 } // namespace
31
32 PaymentManifestDownloader::PaymentManifestDownloader(
33 const scoped_refptr<net::URLRequestContextGetter>& context,
34 const GURL& method_name,
35 Delegate* delegate)
36 : context_(context),
37 method_name_(method_name),
38 delegate_(delegate),
39 is_downloading_http_link_header_(true) {
40 DCHECK(IsValidManifestUrl(method_name_));
41 }
42
43 PaymentManifestDownloader::~PaymentManifestDownloader() {}
44
45 void PaymentManifestDownloader::Download() {
46 InitiateDownload(method_name_, net::URLFetcher::HEAD);
47 }
48
49 void PaymentManifestDownloader::InitiateDownload(
50 const GURL& url,
51 net::URLFetcher::RequestType request_type) {
52 if (!IsValidManifestUrl(url)) {
53 delegate_->OnManifestDownloadFailure();
54 return;
55 }
56
57 fetcher_ = net::URLFetcher::Create(0 /* id */, url, request_type, this);
58 data_use_measurement::DataUseUserData::AttachToFetcher(
59 fetcher_.get(), data_use_measurement::DataUseUserData::PAYMENTS);
60 fetcher_->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
61 net::LOAD_DO_NOT_SAVE_COOKIES);
62 fetcher_->SetStopOnRedirect(true);
63 fetcher_->SetRequestContext(context_.get());
64 fetcher_->Start();
65 }
66
67 void PaymentManifestDownloader::OnURLFetchComplete(
68 const net::URLFetcher* source) {
69 if (source->GetResponseCode() != net::HTTP_OK) {
70 delegate_->OnManifestDownloadFailure();
71 return;
72 }
73
74 if (is_downloading_http_link_header_) {
75 is_downloading_http_link_header_ = false;
76
77 net::HttpResponseHeaders* headers = source->GetResponseHeaders();
78 if (!headers) {
79 delegate_->OnManifestDownloadFailure();
80 return;
81 }
82
83 std::string link_header;
84 headers->GetNormalizedHeader("link", &link_header);
85 if (!link_header.empty()) {
86 std::string manifest_url;
87 std::unordered_map<std::string, base::Optional<std::string>> params;
88 for (const auto& value : link_header_util::SplitLinkHeader(link_header)) {
89 if (!link_header_util::ParseLinkHeaderValue(value.first, value.second,
90 &manifest_url, &params)) {
91 continue;
92 }
93
94 auto rel = params.find("rel");
95 if (rel == params.end())
96 continue;
97
98 std::vector<std::string> rel_parts =
99 base::SplitString(rel->second.value_or(""), HTTP_LWS,
100 base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
101 if (std::find(rel_parts.begin(), rel_parts.end(),
102 "payment-method-manifest") != rel_parts.end()) {
103 InitiateDownload(method_name_.Resolve(manifest_url),
104 net::URLFetcher::GET);
105 return;
106 }
107 }
108 }
109 } else {
110 std::string content;
111 if (source->GetResponseAsString(&content) && !content.empty()) {
112 delegate_->OnManifestDownloadSuccess(content);
113 return;
114 }
115 }
116
117 delegate_->OnManifestDownloadFailure();
118 }
119
120 } // namespace payments
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