henrike@webrtc.org | f7795df | 2014-05-13 18:00:26 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | |
| 12 | #include "webrtc/base/common.h" |
| 13 | #include "webrtc/base/httpcommon.h" |
| 14 | #include "webrtc/base/multipart.h" |
| 15 | |
| 16 | namespace rtc { |
| 17 | |
| 18 | /////////////////////////////////////////////////////////////////////////////// |
| 19 | // MultipartStream |
| 20 | /////////////////////////////////////////////////////////////////////////////// |
| 21 | |
| 22 | MultipartStream::MultipartStream(const std::string& type, |
| 23 | const std::string& boundary) |
| 24 | : type_(type), |
| 25 | boundary_(boundary), |
| 26 | adding_(true), |
| 27 | current_(0), |
| 28 | position_(0) { |
| 29 | // The content type should be multipart/*. |
| 30 | ASSERT(0 == strncmp(type_.c_str(), "multipart/", 10)); |
| 31 | } |
| 32 | |
| 33 | MultipartStream::~MultipartStream() { |
| 34 | Close(); |
| 35 | } |
| 36 | |
| 37 | void MultipartStream::GetContentType(std::string* content_type) { |
| 38 | ASSERT(NULL != content_type); |
| 39 | content_type->assign(type_); |
| 40 | content_type->append("; boundary="); |
| 41 | content_type->append(boundary_); |
| 42 | } |
| 43 | |
| 44 | bool MultipartStream::AddPart(StreamInterface* data_stream, |
| 45 | const std::string& content_disposition, |
| 46 | const std::string& content_type) { |
| 47 | if (!AddPart("", content_disposition, content_type)) |
| 48 | return false; |
| 49 | parts_.push_back(data_stream); |
| 50 | data_stream->SignalEvent.connect(this, &MultipartStream::OnEvent); |
| 51 | return true; |
| 52 | } |
| 53 | |
| 54 | bool MultipartStream::AddPart(const std::string& data, |
| 55 | const std::string& content_disposition, |
| 56 | const std::string& content_type) { |
| 57 | ASSERT(adding_); |
| 58 | if (!adding_) |
| 59 | return false; |
| 60 | std::stringstream ss; |
| 61 | if (!parts_.empty()) { |
| 62 | ss << "\r\n"; |
| 63 | } |
| 64 | ss << "--" << boundary_ << "\r\n"; |
| 65 | if (!content_disposition.empty()) { |
| 66 | ss << ToString(HH_CONTENT_DISPOSITION) << ": " |
| 67 | << content_disposition << "\r\n"; |
| 68 | } |
| 69 | if (!content_type.empty()) { |
| 70 | ss << ToString(HH_CONTENT_TYPE) << ": " |
| 71 | << content_type << "\r\n"; |
| 72 | } |
| 73 | ss << "\r\n" << data; |
| 74 | parts_.push_back(new MemoryStream(ss.str().data(), ss.str().size())); |
| 75 | return true; |
| 76 | } |
| 77 | |
| 78 | void MultipartStream::EndParts() { |
| 79 | ASSERT(adding_); |
| 80 | if (!adding_) |
| 81 | return; |
| 82 | |
| 83 | std::stringstream ss; |
| 84 | if (!parts_.empty()) { |
| 85 | ss << "\r\n"; |
| 86 | } |
| 87 | ss << "--" << boundary_ << "--" << "\r\n"; |
| 88 | parts_.push_back(new MemoryStream(ss.str().data(), ss.str().size())); |
| 89 | |
| 90 | ASSERT(0 == current_); |
| 91 | ASSERT(0 == position_); |
| 92 | adding_ = false; |
| 93 | SignalEvent(this, SE_OPEN | SE_READ, 0); |
| 94 | } |
| 95 | |
| 96 | size_t MultipartStream::GetPartSize(const std::string& data, |
| 97 | const std::string& content_disposition, |
| 98 | const std::string& content_type) const { |
| 99 | size_t size = 0; |
| 100 | if (!parts_.empty()) { |
| 101 | size += 2; // for "\r\n"; |
| 102 | } |
| 103 | size += boundary_.size() + 4; // for "--boundary_\r\n"; |
| 104 | if (!content_disposition.empty()) { |
| 105 | // for ToString(HH_CONTENT_DISPOSITION): content_disposition\r\n |
| 106 | size += std::string(ToString(HH_CONTENT_DISPOSITION)).size() + 2 + |
| 107 | content_disposition.size() + 2; |
| 108 | } |
| 109 | if (!content_type.empty()) { |
| 110 | // for ToString(HH_CONTENT_TYPE): content_type\r\n |
| 111 | size += std::string(ToString(HH_CONTENT_TYPE)).size() + 2 + |
| 112 | content_type.size() + 2; |
| 113 | } |
| 114 | size += 2 + data.size(); // for \r\ndata |
| 115 | return size; |
| 116 | } |
| 117 | |
| 118 | size_t MultipartStream::GetEndPartSize() const { |
| 119 | size_t size = 0; |
| 120 | if (!parts_.empty()) { |
| 121 | size += 2; // for "\r\n"; |
| 122 | } |
| 123 | size += boundary_.size() + 6; // for "--boundary_--\r\n"; |
| 124 | return size; |
| 125 | } |
| 126 | |
| 127 | // |
| 128 | // StreamInterface |
| 129 | // |
| 130 | |
| 131 | StreamState MultipartStream::GetState() const { |
| 132 | if (adding_) { |
| 133 | return SS_OPENING; |
| 134 | } |
| 135 | return (current_ < parts_.size()) ? SS_OPEN : SS_CLOSED; |
| 136 | } |
| 137 | |
| 138 | StreamResult MultipartStream::Read(void* buffer, size_t buffer_len, |
| 139 | size_t* read, int* error) { |
| 140 | if (adding_) { |
| 141 | return SR_BLOCK; |
| 142 | } |
| 143 | size_t local_read; |
| 144 | if (!read) read = &local_read; |
| 145 | while (current_ < parts_.size()) { |
| 146 | StreamResult result = parts_[current_]->Read(buffer, buffer_len, read, |
| 147 | error); |
| 148 | if (SR_EOS != result) { |
| 149 | if (SR_SUCCESS == result) { |
| 150 | position_ += *read; |
| 151 | } |
| 152 | return result; |
| 153 | } |
| 154 | ++current_; |
| 155 | } |
| 156 | return SR_EOS; |
| 157 | } |
| 158 | |
| 159 | StreamResult MultipartStream::Write(const void* data, size_t data_len, |
| 160 | size_t* written, int* error) { |
| 161 | if (error) { |
| 162 | *error = -1; |
| 163 | } |
| 164 | return SR_ERROR; |
| 165 | } |
| 166 | |
| 167 | void MultipartStream::Close() { |
| 168 | for (size_t i = 0; i < parts_.size(); ++i) { |
| 169 | delete parts_[i]; |
| 170 | } |
| 171 | parts_.clear(); |
| 172 | adding_ = false; |
| 173 | current_ = 0; |
| 174 | position_ = 0; |
| 175 | } |
| 176 | |
| 177 | bool MultipartStream::SetPosition(size_t position) { |
| 178 | if (adding_) { |
| 179 | return false; |
| 180 | } |
| 181 | size_t part_size, part_offset = 0; |
| 182 | for (size_t i = 0; i < parts_.size(); ++i) { |
| 183 | if (!parts_[i]->GetSize(&part_size)) { |
| 184 | return false; |
| 185 | } |
| 186 | if (part_offset + part_size > position) { |
| 187 | for (size_t j = i+1; j < _min(parts_.size(), current_+1); ++j) { |
| 188 | if (!parts_[j]->Rewind()) { |
| 189 | return false; |
| 190 | } |
| 191 | } |
| 192 | if (!parts_[i]->SetPosition(position - part_offset)) { |
| 193 | return false; |
| 194 | } |
| 195 | current_ = i; |
| 196 | position_ = position; |
| 197 | return true; |
| 198 | } |
| 199 | part_offset += part_size; |
| 200 | } |
| 201 | return false; |
| 202 | } |
| 203 | |
| 204 | bool MultipartStream::GetPosition(size_t* position) const { |
| 205 | if (position) { |
| 206 | *position = position_; |
| 207 | } |
| 208 | return true; |
| 209 | } |
| 210 | |
| 211 | bool MultipartStream::GetSize(size_t* size) const { |
| 212 | size_t part_size, total_size = 0; |
| 213 | for (size_t i = 0; i < parts_.size(); ++i) { |
| 214 | if (!parts_[i]->GetSize(&part_size)) { |
| 215 | return false; |
| 216 | } |
| 217 | total_size += part_size; |
| 218 | } |
| 219 | if (size) { |
| 220 | *size = total_size; |
| 221 | } |
| 222 | return true; |
| 223 | } |
| 224 | |
| 225 | bool MultipartStream::GetAvailable(size_t* size) const { |
| 226 | if (adding_) { |
| 227 | return false; |
| 228 | } |
| 229 | size_t part_size, total_size = 0; |
| 230 | for (size_t i = current_; i < parts_.size(); ++i) { |
| 231 | if (!parts_[i]->GetAvailable(&part_size)) { |
| 232 | return false; |
| 233 | } |
| 234 | total_size += part_size; |
| 235 | } |
| 236 | if (size) { |
| 237 | *size = total_size; |
| 238 | } |
| 239 | return true; |
| 240 | } |
| 241 | |
| 242 | // |
| 243 | // StreamInterface Slots |
| 244 | // |
| 245 | |
| 246 | void MultipartStream::OnEvent(StreamInterface* stream, int events, int error) { |
| 247 | if (adding_ || (current_ >= parts_.size()) || (parts_[current_] != stream)) { |
| 248 | return; |
| 249 | } |
| 250 | SignalEvent(this, events, error); |
| 251 | } |
| 252 | |
| 253 | } // namespace rtc |