1 // Copyright 2022 The Chromium Authors
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 "net/base/url_search_params.h"
6
7 #include <algorithm>
8 #include <string>
9 #include <string_view>
10 #include <utility>
11 #include <vector>
12
13 #include "base/containers/cxx20_erase_vector.h"
14 #include "base/strings/utf_string_conversions.h"
15 #include "net/base/url_util.h"
16 #include "url/gurl.h"
17
18 namespace net {
19
UrlSearchParams(const GURL & url)20 UrlSearchParams::UrlSearchParams(const GURL& url) {
21 for (auto it = QueryIterator(url); !it.IsAtEnd(); it.Advance()) {
22 // Use unescaped keys and values in order to mitigate potentially different
23 // representations for query search params names/values.
24 // E.g. a space character might be encoded as '+' or as "%20". A character
25 // might be encoded as a character or as its percent encoded
26 // representation (e.g. ?%63=2 should be the same as ?c=2). E.g. ぁ would be
27 // percent encoded as %E3%81%81. Unescapes the given `key` and `value`
28 // using URL escaping rules.
29 params_.emplace_back(UnescapePercentEncodedUrl(it.GetKey()),
30 UnescapePercentEncodedUrl(it.GetValue()));
31 }
32 }
33
34 UrlSearchParams::~UrlSearchParams() = default;
35
Sort()36 void UrlSearchParams::Sort() {
37 // Note: since query is ASCII and we've Unescaped the keys already,
38 // the URL equivalence under No-Vary-Search conditions using the normal string
39 // comparison should be enough.
40 std::stable_sort(params_.begin(), params_.end(),
41 [](const std::pair<std::string, std::string>& a,
42 const std::pair<std::string, std::string>& b) {
43 return a.first < b.first;
44 });
45 }
46
DeleteAllWithNames(const base::flat_set<std::string> & names)47 void UrlSearchParams::DeleteAllWithNames(
48 const base::flat_set<std::string>& names) {
49 base::EraseIf(params_,
50 [&](const auto& pair) { return names.contains(pair.first); });
51 }
52
DeleteAllExceptWithNames(const base::flat_set<std::string> & names)53 void UrlSearchParams::DeleteAllExceptWithNames(
54 const base::flat_set<std::string>& names) {
55 base::EraseIf(params_,
56 [&](const auto& pair) { return !names.contains(pair.first); });
57 }
58
59 const std::vector<std::pair<std::string, std::string>>&
params() const60 UrlSearchParams::params() const {
61 return params_;
62 }
63
64 } // namespace net
65