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util/curl: Add C++ wrapper for CURL

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This commit is contained in:
Michael Fabian 'Xaymar' Dirks 2020-09-09 05:01:24 +02:00
parent 5500e436b7
commit 1107c1e390
3 changed files with 389 additions and 2 deletions
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44
CMakeLists.txt
View file

@ -295,6 +295,7 @@ configure_file(
"${PROJECT_BINARY_DIR}/generated/config.hpp"
)
# libOBS
if(NOT TARGET libobs)
# Packaging
if("${CMAKE_PACKAGE_SUFFIX_OVERRIDE}" STREQUAL "")
@ -442,6 +443,30 @@ if(HAVE_OBS_FRONTEND)
find_package(Qt5 COMPONENTS Core Widgets REQUIRED)
endif()
# CURL
if(REQUIRE_CURL)
find_package(CURL QUIET)
if(NOT CURL_FOUND)
# CURL built by OBS Project is not compatible with find modules.
if(${PropertyPrefix}OBS_DOWNLOAD)
set(CURL_LIBRARIES "${obsdeps_SOURCE_DIR}/win${BITS}/bin/libcurl.lib")
set(CURL_INCLUDE_DIRS "${obsdeps_SOURCE_DIR}/win${BITS}/include")
endif()
if(${PropertyPrefix}OBS_NATIVE) # Already defined by OBS
set(CURL_LIBRARIES "${CURL_LIB}")
set(CURL_INCLUDE_DIRS "${CURL_INCLUDE_DIR}")
endif()
if((${PropertyPrefix}OBS_REFERENCE) OR (${PropertyPrefix}OBS_PACKAGE))
set(CURL_LIBRARIES "${OBS_DEPENDENCIES_DIR}/bin/libcurl.lib")
set(CURL_INCLUDE_DIRS "${OBS_DEPENDENCIES_DIR}/include")
endif()
CacheSet(CURL_LIBRARY_DEBUG ${CURL_LIBRARIES})
CacheSet(CURL_LIBRARY_RELEASE ${CURL_LIBRARIES})
CacheSet(CURL_INCLUDE_DIR ${CURL_INCLUDE_DIRS})
set(CURL_FOUND ON)
endif()
endif()
################################################################################
# Code
################################################################################
@ -456,9 +481,10 @@ set(PROJECT_PUBLIC )
set(PROJECT_PRIVATE_GENERATED )
set(PROJECT_PRIVATE_SOURCE )
set(PROJECT_UI )
set(PROJECT_DEFINES )
set(PROJECT_DEFINITIONS )
## OBS Studio
# Dependencies
## Dependency: libOBS
if(${PropertyPrefix}OBS_NATIVE)
list(APPEND PROJECT_LIBRARIES
libobs
@ -483,6 +509,20 @@ elseif(${PropertyPrefix}OBS_DOWNLOAD)
)
endif()
## Dependency: CURL
if(REQUIRE_CURL)
list(APPEND PROJECT_PRIVATE_SOURCE
"source/util/util-curl.hpp"
"source/util/util-curl.cpp"
)
list(APPEND PROJECT_LIBRARIES
${CURL_LIBRARY_RELEASE}
)
list(APPEND PROJECT_INCLUDE_DIRS
${CURL_INCLUDE_DIR}
)
endif()
## Data & Source
list(APPEND PROJECT_DATA
"data/locale/en-US.ini"

215
source/util/util-curl.cpp Normal file
View file

@ -0,0 +1,215 @@
// Copyright (c) 2020 Michael Fabian Dirks <info@xaymar.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#include "util-curl.hpp"
#include <sstream>
int32_t util::curl::debug_helper(CURL* handle, curl_infotype type, char* data, size_t size, util::curl* self)
{
if (self->_debug_callback) {
self->_debug_callback(handle, type, data, size);
} else {
#ifdef _DEBUG_CURL
std::stringstream hd;
for (size_t n = 0; n < size; n++) {
hd << std::uppercase << std::setfill('0') << std::setw(2) << std::hex << static_cast<int32_t>(data[n])
<< " ";
if (n % 16 == 15) {
hd << "\n ";
}
}
std::string hds = hd.str();
switch (type) {
case CURLINFO_TEXT:
DLOG_DEBUG("<CURL> %.*s", size - 1, data);
break;
case CURLINFO_HEADER_IN:
DLOG_DEBUG("<CURL> << Header: %.*s", size - 1, data);
break;
case CURLINFO_HEADER_OUT:
DLOG_DEBUG("<CURL> >> Header: %.*s", size - 1, data);
break;
case CURLINFO_DATA_IN:
DLOG_DEBUG("<CURL> << %lld bytes of data:\n %s", size, hds.c_str());
break;
case CURLINFO_DATA_OUT:
DLOG_DEBUG("<CURL> >> %lld bytes of data:\n %s", size, hds.c_str());
break;
case CURLINFO_SSL_DATA_IN:
DLOG_DEBUG("<CURL> << %lld bytes of SSL data:\n %s", size, hds.c_str());
break;
case CURLINFO_SSL_DATA_OUT:
DLOG_DEBUG("<CURL> >> %lld bytes of SSL data:\n %s", size, hds.c_str());
break;
}
#endif
}
return 0;
}
size_t util::curl::read_helper(void* ptr, size_t size, size_t count, util::curl* self)
{
if (self->_read_callback) {
return self->_read_callback(ptr, size, count);
} else {
return size * count;
}
}
size_t util::curl::write_helper(void* ptr, size_t size, size_t count, util::curl* self)
{
if (self->_write_callback) {
return self->_write_callback(ptr, size, count);
} else {
return size * count;
}
}
int32_t util::curl::xferinfo_callback(util::curl* self, curl_off_t dlt, curl_off_t dln, curl_off_t ult, curl_off_t uln)
{
if (self->_xferinfo_callback) {
return self->_xferinfo_callback(static_cast<uint64_t>(dlt), static_cast<uint64_t>(dln),
static_cast<uint64_t>(ult), static_cast<uint64_t>(uln));
} else {
return 0;
}
}
util::curl::curl() : _curl(), _read_callback(), _write_callback(), _headers()
{
_curl = curl_easy_init();
set_read_callback(nullptr);
set_write_callback(nullptr);
set_xferinfo_callback(nullptr);
set_debug_callback(nullptr);
// Default settings.
set_option(CURLOPT_NOPROGRESS, false);
set_option(CURLOPT_PATH_AS_IS, false);
set_option(CURLOPT_CRLF, false);
#ifdef _DEBUG
set_option(CURLOPT_VERBOSE, true);
#else
set_option(CURLOPT_VERBOSE, false);
#endif
}
util::curl::~curl()
{
curl_easy_cleanup(_curl);
}
void util::curl::clear_headers()
{
_headers.clear();
}
void util::curl::clear_header(std::string header)
{
_headers.erase(header);
}
void util::curl::set_header(std::string header, std::string value)
{
_headers.insert_or_assign(header, value);
}
size_t perform_get_kv_size(std::string a, std::string b)
{
return a.size() + 2 + b.size() + 1;
};
CURLcode util::curl::perform()
{
std::vector<char> buffer;
struct curl_slist* headers = nullptr;
if (_headers.size() > 0) {
// Calculate full buffer size.
{
size_t buffer_size = 0;
for (auto kv : _headers) {
buffer_size += perform_get_kv_size(kv.first, kv.second);
}
buffer.resize(buffer_size * 2);
}
// Create HTTP Headers.
{
size_t buffer_offset = 0;
for (auto kv : _headers) {
size_t size = perform_get_kv_size(kv.first, kv.second);
snprintf(&buffer.at(buffer_offset), size, "%s: %s", kv.first.c_str(), kv.second.c_str());
headers = curl_slist_append(headers, &buffer.at(buffer_offset));
buffer_offset += size;
}
}
set_option<struct curl_slist*>(CURLOPT_HTTPHEADER, headers);
}
CURLcode res = curl_easy_perform(_curl);
if (headers) {
set_option<struct curl_slist*>(CURLOPT_HTTPHEADER, nullptr);
curl_slist_free_all(headers);
}
return res;
}
void util::curl::reset()
{
curl_easy_reset(_curl);
}
CURLcode util::curl::set_read_callback(curl_io_callback_t cb)
{
_read_callback = cb;
if (CURLcode res = curl_easy_setopt(_curl, CURLOPT_READDATA, this); res != CURLE_OK)
return res;
return curl_easy_setopt(_curl, CURLOPT_READFUNCTION, &read_helper);
}
CURLcode util::curl::set_write_callback(curl_io_callback_t cb)
{
_write_callback = cb;
if (CURLcode res = curl_easy_setopt(_curl, CURLOPT_WRITEDATA, this); res != CURLE_OK)
return res;
return curl_easy_setopt(_curl, CURLOPT_WRITEFUNCTION, &write_helper);
}
CURLcode util::curl::set_xferinfo_callback(curl_xferinfo_callback_t cb)
{
_xferinfo_callback = cb;
if (CURLcode res = curl_easy_setopt(_curl, CURLOPT_XFERINFODATA, this); res != CURLE_OK)
return res;
return curl_easy_setopt(_curl, CURLOPT_XFERINFOFUNCTION, &xferinfo_callback);
}
CURLcode util::curl::set_debug_callback(curl_debug_callback_t cb)
{
_debug_callback = cb;
if (CURLcode res = curl_easy_setopt(_curl, CURLOPT_DEBUGDATA, this); res != CURLE_OK)
return res;
return curl_easy_setopt(_curl, CURLOPT_DEBUGFUNCTION, &debug_helper);
}

132
source/util/util-curl.hpp Normal file
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@ -0,0 +1,132 @@
// Copyright (c) 2020 Michael Fabian Dirks <info@xaymar.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
#pragma once
#include <cinttypes>
#include <functional>
#include <map>
#include <string>
extern "C" {
#ifndef NOMINMAX
#define NOMINMAX
#endif
#include <curl/curl.h>
}
namespace util {
typedef std::function<size_t(void*, size_t, size_t)> curl_io_callback_t;
typedef std::function<int32_t(uint64_t, uint64_t, uint64_t, uint64_t)> curl_xferinfo_callback_t;
typedef std::function<void(CURL*, curl_infotype, char*, size_t)> curl_debug_callback_t;
class curl {
CURL* _curl;
curl_io_callback_t _read_callback;
curl_io_callback_t _write_callback;
curl_xferinfo_callback_t _xferinfo_callback;
curl_debug_callback_t _debug_callback;
std::map<std::string, std::string> _headers;
static int32_t debug_helper(CURL* handle, curl_infotype type, char* data, size_t size, util::curl* userptr);
static size_t read_helper(void*, size_t, size_t, util::curl*);
static size_t write_helper(void*, size_t, size_t, util::curl*);
static int32_t xferinfo_callback(util::curl*, curl_off_t, curl_off_t, curl_off_t, curl_off_t);
public:
curl();
~curl();
template<typename _Ty1>
CURLcode set_option(CURLoption opt, _Ty1 value)
{
return curl_easy_setopt(_curl, opt, value);
};
template<>
CURLcode set_option(CURLoption opt, const bool value)
{
// CURL does not seem to accept boolean, so we err on the side of safety here.
return curl_easy_setopt(_curl, opt, value ? 1 : 0);
};
template<>
CURLcode set_option(CURLoption opt, const std::string value)
{
return curl_easy_setopt(_curl, opt, value.c_str());
};
template<>
CURLcode set_option(CURLoption opt, const std::string_view value)
{
return curl_easy_setopt(_curl, opt, value.data());
};
template<typename _Ty1>
CURLcode get_info(CURLINFO info, _Ty1& value)
{
return curl_easy_getinfo(_curl, info, &value);
};
template<>
CURLcode get_info(CURLINFO info, std::vector<char>& value)
{
char* buffer;
if (CURLcode res = curl_easy_getinfo(_curl, info, &buffer); res != CURLE_OK) {
return res;
}
size_t buffer_len = strnlen(buffer, size_t(0xFFFF));
value.resize(buffer_len);
memcpy(value.data(), buffer, value.size());
return CURLE_OK;
};
template<>
CURLcode get_info(CURLINFO info, std::string& value)
{
std::vector<char> buffer;
if (CURLcode res = get_info(info, buffer); res != CURLE_OK) {
return res;
}
value = std::string(buffer.data(), buffer.data() + strlen(buffer.data()));
return CURLE_OK;
};
void clear_headers();
void clear_header(std::string header);
void set_header(std::string header, std::string value);
CURLcode perform();
void reset();
public /* Helpers */:
CURLcode set_read_callback(curl_io_callback_t cb);
CURLcode set_write_callback(curl_io_callback_t cb);
CURLcode set_xferinfo_callback(curl_xferinfo_callback_t cb);
CURLcode set_debug_callback(curl_debug_callback_t cb);
};
} // namespace util