2 * Copyright (c) 2022 Samsung Electronics Co., Ltd.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include <dali/internal/imaging/common/file-download.h>
22 #include <curl/curl.h>
23 #include <dali/integration-api/debug.h>
29 #include <dali/internal/system/common/file-writer.h>
31 using namespace Dali::Integration;
35 namespace TizenPlatform
37 namespace // unnamed namespace
39 const int CONNECTION_TIMEOUT_SECONDS(30L);
40 const int TIMEOUT_SECONDS(120L);
41 const long VERBOSE_MODE = 0L; // 0 == off, 1 == on
42 const long CLOSE_CONNECTION_ON_ERROR = 1L; // 0 == off, 1 == on
43 const long EXCLUDE_HEADER = 0L;
44 const long INCLUDE_HEADER = 1L;
45 const long INCLUDE_BODY = 0L;
46 const long EXCLUDE_BODY = 1L;
49 * Curl library environment. Direct initialize ensures it's constructed before adaptor
50 * or application creates any threads.
52 static Dali::TizenPlatform::Network::CurlEnvironment gCurlEnvironment;
54 void ConfigureCurlOptions(CURL* curlHandle, const std::string& url)
56 curl_easy_setopt(curlHandle, CURLOPT_URL, url.c_str());
57 curl_easy_setopt(curlHandle, CURLOPT_VERBOSE, VERBOSE_MODE);
59 // CURLOPT_FAILONERROR is not fail-safe especially when authentication is involved ( see manual )
60 // Removed CURLOPT_FAILONERROR option
61 curl_easy_setopt(curlHandle, CURLOPT_CONNECTTIMEOUT, CONNECTION_TIMEOUT_SECONDS);
62 curl_easy_setopt(curlHandle, CURLOPT_TIMEOUT, TIMEOUT_SECONDS);
63 curl_easy_setopt(curlHandle, CURLOPT_HEADER, INCLUDE_HEADER);
64 curl_easy_setopt(curlHandle, CURLOPT_NOBODY, EXCLUDE_BODY);
65 curl_easy_setopt(curlHandle, CURLOPT_NOSIGNAL, 1L);
66 curl_easy_setopt(curlHandle, CURLOPT_FOLLOWLOCATION, 1L);
67 curl_easy_setopt(curlHandle, CURLOPT_MAXREDIRS, 5L);
69 // If the proxy variable is set, ensure it's also used.
70 // In theory, this variable should be used by the curl library; however, something
72 char* proxy = std::getenv("http_proxy");
75 curl_easy_setopt(curlHandle, CURLOPT_PROXY, proxy);
79 // Without a write function or a buffer (file descriptor) to write to, curl will pump out
80 // header/body contents to stdout
81 size_t DummyWrite(char* ptr, size_t size, size_t nmemb, void* userdata)
88 std::vector<uint8_t> data;
91 size_t ChunkLoader(char* ptr, size_t size, size_t nmemb, void* userdata)
93 std::vector<ChunkData>* chunks = static_cast<std::vector<ChunkData>*>(userdata);
94 int numBytes = size * nmemb;
95 chunks->push_back(ChunkData());
96 ChunkData& chunkData = (*chunks)[chunks->size() - 1];
97 chunkData.data.reserve(numBytes);
98 memcpy(&chunkData.data[0], ptr, numBytes);
102 CURLcode DownloadFileDataWithSize(CURL* curlHandle, Dali::Vector<uint8_t>& dataBuffer, size_t dataSize)
104 CURLcode result(CURLE_OK);
107 Dali::Internal::Platform::FileWriter fileWriter(dataBuffer, dataSize);
108 FILE* dataBufferFilePointer = fileWriter.GetFile();
109 if(NULL != dataBufferFilePointer)
111 // we only want the body which contains the file data
112 curl_easy_setopt(curlHandle, CURLOPT_HEADER, EXCLUDE_HEADER);
113 curl_easy_setopt(curlHandle, CURLOPT_NOBODY, INCLUDE_BODY);
115 // disable the write callback, and get curl to write directly into our data buffer
116 curl_easy_setopt(curlHandle, CURLOPT_WRITEFUNCTION, NULL);
117 curl_easy_setopt(curlHandle, CURLOPT_WRITEDATA, dataBufferFilePointer);
119 // synchronous request of the body data
120 result = curl_easy_perform(curlHandle);
125 CURLcode DownloadFileDataByChunk(CURL* curlHandle, Dali::Vector<uint8_t>& dataBuffer, size_t& dataSize)
128 std::vector<ChunkData> chunks;
130 // we only want the body which contains the file data
131 curl_easy_setopt(curlHandle, CURLOPT_HEADER, EXCLUDE_HEADER);
132 curl_easy_setopt(curlHandle, CURLOPT_NOBODY, INCLUDE_BODY);
134 // Enable the write callback.
135 curl_easy_setopt(curlHandle, CURLOPT_WRITEFUNCTION, ChunkLoader);
136 curl_easy_setopt(curlHandle, CURLOPT_WRITEDATA, &chunks);
138 // synchronous request of the body data
139 CURLcode result = curl_easy_perform(curlHandle);
141 // chunks should now contain all of the chunked data. Reassemble into a single vector
143 for(size_t i = 0; i < chunks.size(); ++i)
145 dataSize += chunks[i].data.capacity();
147 dataBuffer.ResizeUninitialized(dataSize);
149 if(DALI_LIKELY(dataSize > 0))
151 std::uint8_t* dataBufferPtr = dataBuffer.Begin();
152 for(size_t i = 0; i < chunks.size(); ++i)
154 memcpy(dataBufferPtr, &chunks[i].data[0], chunks[i].data.capacity());
155 dataBufferPtr += chunks[i].data.capacity();
162 bool DownloadFile(CURL* curlHandle,
163 const std::string& url,
164 Dali::Vector<uint8_t>& dataBuffer,
166 size_t maximumAllowedSizeBytes,
169 CURLcode result(CURLE_OK);
172 // setup curl to download just the header so we can extract the content length
173 ConfigureCurlOptions(curlHandle, url);
174 curl_easy_setopt(curlHandle, CURLOPT_WRITEFUNCTION, DummyWrite);
175 if(errorBuffer != nullptr)
180 // perform the request to get the header
181 result = curl_easy_perform(curlHandle);
183 if(result != CURLE_OK)
185 if(errorBuffer != nullptr)
187 DALI_LOG_ERROR("Failed to download http header for \"%s\" with error code %d (%s)\n", url.c_str(), result, &errorBuffer[0]);
191 DALI_LOG_ERROR("Failed to download http header for \"%s\" with error code %d\n", url.c_str(), result);
196 // get the content length, -1 == size is not known
197 curl_easy_getinfo(curlHandle, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &size);
199 if(size >= maximumAllowedSizeBytes)
201 DALI_LOG_ERROR("File content length %f > max allowed %zu \"%s\" \n", size, maximumAllowedSizeBytes, url.c_str());
206 // If we know the size up front, allocate once and avoid chunk copies.
207 dataSize = static_cast<size_t>(size);
208 result = DownloadFileDataWithSize(curlHandle, dataBuffer, dataSize);
212 result = DownloadFileDataByChunk(curlHandle, dataBuffer, dataSize);
215 if(result != CURLE_OK)
217 if(errorBuffer != nullptr)
219 DALI_LOG_ERROR("Failed to download image file \"%s\" with error code %d\n", url.c_str(), result);
223 DALI_LOG_ERROR("Failed to download image file \"%s\" with error code %d (%s)\n", url.c_str(), result, errorBuffer);
230 } // unnamed namespace
234 CurlEnvironment::CurlEnvironment()
236 // Must be called before we attempt any loads. e.g. by using curl_easy_init()
237 // and before we start any threads.
238 curl_global_init(CURL_GLOBAL_ALL);
241 CurlEnvironment::~CurlEnvironment()
243 curl_global_cleanup();
246 bool DownloadRemoteFileIntoMemory(const std::string& url,
247 Dali::Vector<uint8_t>& dataBuffer,
249 size_t maximumAllowedSizeBytes)
255 DALI_LOG_WARNING("empty url requested \n");
259 // start a libcurl easy session, this internally calls curl_global_init, if we ever have more than one download
260 // thread we need to explicity call curl_global_init() on startup from a single thread.
262 CURL* curlHandle = curl_easy_init();
265 std::vector<char> errorBuffer(CURL_ERROR_SIZE);
266 curl_easy_setopt(curlHandle, CURLOPT_ERRORBUFFER, &errorBuffer[0]);
267 result = DownloadFile(curlHandle, url, dataBuffer, dataSize, maximumAllowedSizeBytes, &errorBuffer[0]);
270 curl_easy_cleanup(curlHandle);
275 } // namespace Network
277 } // namespace TizenPlatform