| // Copyright 2014 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include <chromeos/http/http_form_data.h> |
| |
| #include <limits> |
| |
| #include <base/format_macros.h> |
| #include <base/rand_util.h> |
| #include <base/strings/stringprintf.h> |
| |
| #include <chromeos/errors/error_codes.h> |
| #include <chromeos/http/http_transport.h> |
| #include <chromeos/mime_utils.h> |
| |
| namespace chromeos { |
| namespace http { |
| |
| namespace form_header { |
| const char kContentDisposition[] = "Content-Disposition"; |
| const char kContentTransferEncoding[] = "Content-Transfer-Encoding"; |
| const char kContentType[] = "Content-Type"; |
| } // namespace form_header |
| |
| const char content_disposition::kFile[] = "file"; |
| const char content_disposition::kFormData[] = "form-data"; |
| |
| FormField::FormField(const std::string& name, |
| const std::string& content_disposition, |
| const std::string& content_type, |
| const std::string& transfer_encoding) |
| : name_{name}, |
| content_disposition_{content_disposition}, |
| content_type_{content_type}, |
| transfer_encoding_{transfer_encoding} {} |
| |
| std::string FormField::GetContentDisposition() const { |
| std::string disposition = content_disposition_; |
| if (!name_.empty()) |
| base::StringAppendF(&disposition, "; name=\"%s\"", name_.c_str()); |
| return disposition; |
| } |
| |
| std::string FormField::GetContentType() const { |
| return content_type_; |
| } |
| |
| std::string FormField::GetContentHeader() const { |
| HeaderList headers{ |
| {form_header::kContentDisposition, GetContentDisposition()} |
| }; |
| |
| if (!content_type_.empty()) |
| headers.emplace_back(form_header::kContentType, GetContentType()); |
| |
| if (!transfer_encoding_.empty()) { |
| headers.emplace_back(form_header::kContentTransferEncoding, |
| transfer_encoding_); |
| } |
| |
| std::string result; |
| for (const auto& pair : headers) { |
| base::StringAppendF(&result, "%s: %s\r\n", |
| pair.first.c_str(), pair.second.c_str()); |
| } |
| result += "\r\n"; |
| return result; |
| } |
| |
| TextFormField::TextFormField(const std::string& name, |
| const std::string& data, |
| const std::string& content_type, |
| const std::string& transfer_encoding) |
| : FormField{name, content_disposition::kFormData, content_type, |
| transfer_encoding}, |
| data_{data} {} |
| |
| uint64_t TextFormField::GetDataSize() const { |
| return data_.GetDataSize(); |
| } |
| |
| bool TextFormField::ReadData(void* buffer, |
| size_t size_to_read, |
| size_t* size_read, |
| chromeos::ErrorPtr* error) { |
| return data_.ReadData(buffer, size_to_read, size_read, error); |
| } |
| |
| FileFormField::FileFormField(const std::string& name, |
| base::File file, |
| const std::string& file_name, |
| const std::string& content_disposition, |
| const std::string& content_type, |
| const std::string& transfer_encoding) |
| : FormField{name, content_disposition, content_type, transfer_encoding}, |
| file_{file.Pass()}, |
| file_name_{file_name} {} |
| |
| |
| uint64_t FileFormField::GetDataSize() const { |
| // Unfortunately base::File::GetLength() is not a const method of the class, |
| // for no apparent reason, so have to const_cast the file reference. |
| // TODO(avakulenko): Remove this cast once the base::File::GetLength() is |
| // fixed. See crbug.com/446528 |
| int64_t size = const_cast<base::File&>(file_).GetLength(); |
| return size < 0 ? 0 : size; |
| } |
| |
| std::string FileFormField::GetContentDisposition() const { |
| std::string disposition = FormField::GetContentDisposition(); |
| base::StringAppendF(&disposition, "; filename=\"%s\"", file_name_.c_str()); |
| return disposition; |
| } |
| |
| bool FileFormField::ReadData(void* buffer, |
| size_t size_to_read, |
| size_t* size_read, |
| chromeos::ErrorPtr* error) { |
| // base::File uses 'int' for sizes. On 64 bit systems size_t can be larger |
| // than what 'int' can contain, so limit the reading to the max size. |
| // This is acceptable because ReadData is not guaranteed to read all the data |
| // at once. The caller is expected to keep calling this function until all |
| // the data have been read. |
| const size_t max_size = std::numeric_limits<int>::max(); |
| if (size_to_read > max_size) |
| size_to_read = max_size; |
| |
| int read = file_.ReadAtCurrentPosNoBestEffort(reinterpret_cast<char*>(buffer), |
| size_to_read); |
| if (read < 0) { |
| chromeos::errors::system::AddSystemError(error, FROM_HERE, errno); |
| return false; |
| } |
| *size_read = read; |
| return true; |
| } |
| |
| MultiPartFormField::MultiPartFormField(const std::string& name, |
| const std::string& content_type, |
| const std::string& boundary) |
| : FormField{name, content_disposition::kFormData, |
| content_type.empty() ? mime::multipart::kMixed : content_type, |
| {}}, |
| boundary_{boundary} { |
| if (boundary_.empty()) |
| boundary_ = base::StringPrintf("%016" PRIx64, base::RandUint64()); |
| } |
| |
| uint64_t MultiPartFormField::GetDataSize() const { |
| uint64_t boundary_size = GetBoundaryStart().size(); |
| uint64_t size = 0; |
| for (const auto& part : parts_) { |
| size += boundary_size; |
| size += part->GetContentHeader().size(); |
| size += part->GetDataSize(); |
| size += 2; // CRLF |
| } |
| if (!parts_.empty()) |
| size += GetBoundaryEnd().size(); |
| return size; |
| } |
| |
| std::string MultiPartFormField::GetContentType() const { |
| return base::StringPrintf("%s; boundary=\"%s\"", |
| content_type_.c_str(), boundary_.c_str()); |
| } |
| |
| bool MultiPartFormField::ReadData(void* buffer, |
| size_t size_to_read, |
| size_t* size_read, |
| chromeos::ErrorPtr* error) { |
| if (read_stage_ == ReadStage::kStart) { |
| if (parts_.empty()) { |
| *size_read = 0; |
| return true; |
| } |
| read_stage_ = ReadStage::kBoundarySetup; |
| read_part_index_ = 0; |
| } |
| |
| for (;;) { |
| if (read_stage_ == ReadStage::kBoundarySetup && |
| read_part_index_ < parts_.size()) { |
| // Starting a new part. Read the part boundary and headers first. |
| read_stage_ = ReadStage::kBoundaryData; |
| std::string boundary; |
| if (read_part_index_ > 0) |
| boundary = "\r\n"; |
| boundary += GetBoundaryStart() + |
| parts_[read_part_index_]->GetContentHeader(); |
| boundary_reader_.SetData(boundary); |
| } else if (read_stage_ == ReadStage::kBoundarySetup && |
| read_part_index_ >= parts_.size()) { |
| // Final part has been read. Read the closing boundary. |
| read_stage_ = ReadStage::kEnd; |
| boundary_reader_.SetData("\r\n" + GetBoundaryEnd()); |
| } else if (read_stage_ == ReadStage::kBoundaryData || |
| read_stage_ == ReadStage::kEnd) { |
| // Reading the boundary data (possibly the closing boundary). |
| if (!boundary_reader_.ReadData(buffer, size_to_read, size_read, error)) |
| return false; |
| // Remain in the current stage for as long as there is data in the buffer, |
| // or we're in kEnd (since there is no next stage for kEnd). |
| if (*size_read > 0 || read_stage_ == ReadStage::kEnd) |
| return true; |
| read_stage_ = ReadStage::kPart; |
| } else if (read_stage_ == ReadStage::kPart) { |
| // Reading the actual part data. |
| if (!parts_[read_part_index_]->ReadData(buffer, size_to_read, |
| size_read, error)) { |
| return false; |
| } |
| if (*size_read > 0) |
| return true; |
| read_part_index_++; |
| read_stage_ = ReadStage::kBoundarySetup; |
| } |
| } |
| return false; |
| } |
| |
| void MultiPartFormField::AddCustomField(std::unique_ptr<FormField> field) { |
| parts_.push_back(std::move(field)); |
| } |
| |
| void MultiPartFormField::AddTextField(const std::string& name, |
| const std::string& data) { |
| AddCustomField(std::unique_ptr<FormField>{new TextFormField{name, data}}); |
| } |
| |
| bool MultiPartFormField::AddFileField(const std::string& name, |
| const base::FilePath& file_path, |
| const std::string& content_disposition, |
| const std::string& content_type, |
| chromeos::ErrorPtr* error) { |
| base::File file{file_path, base::File::FLAG_OPEN | base::File::FLAG_READ}; |
| if (!file.IsValid()) { |
| chromeos::errors::system::AddSystemError(error, FROM_HERE, errno); |
| return false; |
| } |
| std::string file_name = file_path.BaseName().value(); |
| std::unique_ptr<FormField> file_field{ |
| new FileFormField{name, file.Pass(), file_name, content_disposition, |
| content_type, "binary" } |
| }; |
| AddCustomField(std::move(file_field)); |
| return true; |
| } |
| |
| std::string MultiPartFormField::GetBoundaryStart() const { |
| return base::StringPrintf("--%s\r\n", boundary_.c_str()); |
| } |
| |
| std::string MultiPartFormField::GetBoundaryEnd() const { |
| return base::StringPrintf("--%s--", boundary_.c_str()); |
| } |
| |
| FormData::FormData() : FormData{std::string{}} {} |
| |
| FormData::FormData(const std::string& boundary) |
| : form_data_{"", mime::multipart::kFormData, boundary} {} |
| |
| void FormData::AddCustomField(std::unique_ptr<FormField> field) { |
| form_data_.AddCustomField(std::move(field)); |
| } |
| |
| void FormData::AddTextField(const std::string& name, |
| const std::string& data) { |
| form_data_.AddTextField(name, data); |
| } |
| |
| bool FormData::AddFileField(const std::string& name, |
| const base::FilePath& file_path, |
| const std::string& content_type, |
| chromeos::ErrorPtr* error) { |
| return form_data_.AddFileField(name, file_path, |
| content_disposition::kFormData, |
| content_type, error); |
| } |
| |
| std::string FormData::GetContentType() const { |
| return form_data_.GetContentType(); |
| } |
| |
| uint64_t FormData::GetDataSize() const { |
| return form_data_.GetDataSize(); |
| } |
| |
| bool FormData::ReadData(void* buffer, |
| size_t size_to_read, |
| size_t* size_read, |
| chromeos::ErrorPtr* error) { |
| return form_data_.ReadData(buffer, size_to_read, size_read, error); |
| } |
| |
| } // namespace http |
| } // namespace chromeos |