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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/web_share_target/target_util.h"
#include <sstream>
#include <utility>
#include "base/files/file_path.h"
#include "base/strings/escape.h"
#include "base/time/time.h"
#include "build/build_config.h"
#include "net/base/mime_util.h"
#include "services/network/public/cpp/resource_request_body.h"
namespace {
void AddFile(const std::string& value_name,
const std::string& file_uri,
const std::string& file_name,
const std::string& content_type,
const std::string& boundary,
scoped_refptr<network::ResourceRequestBody> request_body) {
const char delimiter[] = "\r\n";
std::string mime_header;
// First line is the boundary.
mime_header.append("--" + boundary + delimiter);
// Next line is the Content-disposition.
mime_header.append("Content-Disposition: form-data; name=\"" + value_name +
"\"");
if (!file_name.empty()) {
mime_header.append("; filename=\"" + file_name + "\"");
}
mime_header.append(delimiter);
if (!content_type.empty()) {
// If Content-type is specified, the next line is that.
mime_header.append("Content-Type: " + content_type + delimiter);
}
// Leave an empty line before appending the file_uri.
mime_header.append(delimiter);
request_body->AppendCopyOfBytes(base::as_byte_span(mime_header));
request_body->AppendFileRange(
#if BUILDFLAG(IS_WIN)
base::FilePath::FromUTF8Unsafe(file_uri),
#else
base::FilePath(file_uri),
#endif
0, -1, base::Time());
request_body->AppendCopyOfBytes(base::byte_span_from_cstring(delimiter));
}
void AddPlainText(const std::string& value_name,
const std::string& value,
const std::string& file_name,
const std::string& content_type,
const std::string& boundary,
scoped_refptr<network::ResourceRequestBody> request_body) {
std::string item;
if (file_name.empty()) {
net::AddMultipartValueForUpload(value_name, value, boundary, content_type,
&item);
} else {
net::AddMultipartValueForUploadWithFileName(value_name, file_name, value,
boundary, content_type, &item);
}
request_body->AppendCopyOfBytes(base::as_byte_span(item));
}
} // namespace
namespace web_share_target {
std::string PercentEscapeString(const std::string& unescaped_string) {
std::ostringstream escaped_oss;
for (char c : unescaped_string) {
if (c == '"') {
escaped_oss << "%22";
} else if (c == 0x0a) {
escaped_oss << "%0A";
} else if (c == 0x0d) {
escaped_oss << "%0D";
} else {
escaped_oss << c;
}
}
return escaped_oss.str();
}
scoped_refptr<network::ResourceRequestBody> ComputeMultipartBody(
const std::vector<std::string>& names,
const std::vector<std::string>& values,
const std::vector<bool>& is_value_file_uris,
const std::vector<std::string>& filenames,
const std::vector<std::string>& types,
const std::string& boundary) {
const size_t num_files = names.size();
if (num_files != values.size() || num_files != is_value_file_uris.size() ||
num_files != filenames.size() || num_files != types.size()) {
// The length of all arrays should always be the same for multipart POST.
// This should never happen.
return nullptr;
}
scoped_refptr<network::ResourceRequestBody> request_body =
new network::ResourceRequestBody();
for (size_t i = 0; i < num_files; i++) {
if (is_value_file_uris[i]) {
AddFile(PercentEscapeString(names[i]), values[i],
PercentEscapeString(filenames[i]), types[i], boundary,
request_body);
} else {
AddPlainText(PercentEscapeString(names[i]), values[i],
PercentEscapeString(filenames[i]), types[i], boundary,
request_body);
}
}
std::string final_delimiter;
net::AddMultipartFinalDelimiterForUpload(boundary, &final_delimiter);
request_body->AppendCopyOfBytes(base::as_byte_span(final_delimiter));
return request_body;
}
std::string ComputeUrlEncodedBody(const std::vector<std::string>& names,
const std::vector<std::string>& values) {
if (names.size() != values.size() || names.size() == 0)
return "";
std::ostringstream application_body_oss;
application_body_oss << base::EscapeUrlEncodedData(names[0], true) << "="
<< base::EscapeUrlEncodedData(values[0], true);
for (size_t i = 1; i < names.size(); i++)
application_body_oss << "&" << base::EscapeUrlEncodedData(names[i], true)
<< "=" << base::EscapeUrlEncodedData(values[i], true);
return application_body_oss.str();
}
} // namespace web_share_target
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