Update CPR to latest git.

vendor/CPR/CMakeLists.txt

@@ -13,6 +13,7 @@ add_library(CPR STATIC
     cpr/payload.cpp
     cpr/proxies.cpp
     cpr/proxyauth.cpp
+    cpr/redirect.cpp
     cpr/session.cpp
     cpr/timeout.cpp
     cpr/unix_socket.cpp
@@ -30,14 +31,15 @@ add_library(CPR STATIC
     include/cpr/curlholder.h
     include/cpr/digest.h
     include/cpr/error.h
+    include/cpr/interface.h
     include/cpr/limit_rate.h
-    include/cpr/max_redirects.h
     include/cpr/multipart.h
     include/cpr/ntlm.h
     include/cpr/parameters.h
     include/cpr/payload.h
     include/cpr/proxies.h
     include/cpr/proxyauth.h
+    include/cpr/redirect.h
     include/cpr/response.h
     include/cpr/session.h
     include/cpr/ssl_options.h

vendor/CPR/CONTRIBUTING.md

@@ -1,27 +0,0 @@
-# Contributing to C++ Requests
-
-Please fork this repository and contribute back using [pull requests](https://github.com/whoshuu/cpr/pulls). Features can be requested using [issues](https://github.com/whoshuu/cpr/issues). All code, comments, and critiques are greatly appreciated.
-
-## Formatting
-
-To avoid unproductive debates on formatting, this project uses `clang-format` to ensure a consistent style across all source files. Currently, `clang-format` 3.8 is the version of `clang-format` we use. The format file can be found [here](https://github.com/whoshuu/cpr/blob/master/.clang-format). To install `clang-format` on Ubuntu, run this:
-
-```
-apt-get install clang-format-3.8
-```
-
-To install `clang-format` on OS X, run this:
-
-```
-brew install clang-format
-```
-
-Note that `brew` might install a later version of `clang-format`, but it should be mostly compatible with what's run on the Travis servers.
-
-To run `clang-format` on every source file, run this in the root directory:
-
-```
-./format-check.sh
-```
-
-This should indicate which files need formatting and also show a diff of the requested changes. More specific usage instructions can be found on the official [LLVM website](http://releases.llvm.org/3.8.0/tools/clang/docs/ClangFormat.html).

vendor/CPR/README.md

@@ -1,141 +0,0 @@
-# C++ Requests: Curl for People <img align="right" height="40" src="http://i.imgur.com/d9Xtyts.png">
-
-[![Documentation](https://img.shields.io/badge/docs-online-informational?style=flat&link=https://whoshuu.github.io/cpr/)](https://whoshuu.github.io/cpr/)
-![CI](https://github.com/whoshuu/cpr/workflows/CI/badge.svg)
-
-## Announcements
-
-The cpr project has new maintainers: [Fabian Sauter](https://github.com/com8) and [Tim Stack](https://github.com/tstack).
-
-## TLDR
-
-C++ Requests is a simple wrapper around [libcurl](http://curl.haxx.se/libcurl) inspired by the excellent [Python Requests](https://github.com/kennethreitz/requests) project.
-
-Despite its name, libcurl's easy interface is anything but, and making mistakes misusing it is a common source of error and frustration. Using the more expressive language facilities of C++11, this library captures the essence of making network calls into a few concise idioms.
-
-Here's a quick GET request:
-
-```c++
-#include <cpr/cpr.h>
-
-int main(int argc, char** argv) {
-    cpr::Response r = cpr::Get(cpr::Url{"https://api.github.com/repos/whoshuu/cpr/contributors"},
-                      cpr::Authentication{"user", "pass"},
-                      cpr::Parameters{{"anon", "true"}, {"key", "value"}});
-    r.status_code;                  // 200
-    r.header["content-type"];       // application/json; charset=utf-8
-    r.text;                         // JSON text string
-}
-```
-
-And here's [less functional, more complicated code, without cpr](https://gist.github.com/whoshuu/2dc858b8730079602044).
-
-## Documentation
-
-[![Documentation](https://img.shields.io/badge/docs-online-informational?style=for-the-badge&link=https://whoshuu.github.io/cpr/)](https://whoshuu.github.io/cpr/)  
-You can find the latest documentation [here](https://whoshuu.github.io/cpr). It's a work in progress, but it should give you a better idea of how to use the library than the [tests](https://github.com/whoshuu/cpr/tree/master/test) currently do.
-
-## Features
-
-C++ Requests currently supports:
-
-* Custom headers
-* Url encoded parameters
-* Url encoded POST values
-* Multipart form POST upload
-* File POST upload
-* Basic authentication
-* Bearer authentication
-* Digest authentication
-* NTLM authentication
-* Connection and request timeout specification
-* Timeout for low speed connection
-* Asynchronous requests
-* :cookie: support!
-* Proxy support
-* Callback interfaces
-* PUT methods
-* DELETE methods
-* HEAD methods
-* OPTIONS methods
-* PATCH methods
-* Thread Safe access to [libCurl](https://curl.haxx.se/libcurl/c/threadsafe.html)
-* OpenSSL and WinSSL support for HTTPS requests
-
-## Planned
-
-For a quick overview about the planed features, have a look at the next [Milestones](https://github.com/whoshuu/cpr/milestones).
-
-## Usage
-
-If you already have a project you need to integrate C++ Requests with, the primary way is to use CMake `fetch_content`.
-Add the following to your `CMakeLists.txt`.
-
-
-```cmake
-include(FetchContent)
-FetchContent_Declare(cpr GIT_REPOSITORY https://github.com/whoshuu/cpr.git GIT_TAG c8d33915dbd88ad6c92b258869b03aba06587ff9) # the commit hash for 1.5.0
-FetchContent_MakeAvailable(cpr)
-```
-
-This will produce the target `cpr::cpr` which you can link against the typical way:
-
-```cmake
-target_link_libraries(your_target_name PRIVATE cpr::cpr)
-```
-
-That should do it!
-There's no need to handle `libcurl` yourself. All dependencies are taken care of for you.
-
-## Requirements
-
-The only explicit requirements are:
-
-* a `C++11` compatible compiler such as Clang or GCC. The minimum required version of GCC is unknown, so if anyone has trouble building this library with a specific version of GCC, do let me know
-* If you would like to perform https requests `OpenSSL` and its development libraries are required.
-
-## Building cpr - Using vcpkg
-
-You can download and install cpr using the [vcpkg](https://github.com/Microsoft/vcpkg) dependency manager:
-```Bash
-git clone https://github.com/Microsoft/vcpkg.git
-cd vcpkg
-./bootstrap-vcpkg.sh
-./vcpkg integrate install
-./vcpkg install cpr
-```
-The `cpr` port in vcpkg is kept up to date by Microsoft team members and community contributors. If the version is out of date, please [create an issue or pull request](https://github.com/Microsoft/vcpkg) on the vcpkg repository.
-
-## Building cpr - Using Conan
-
-You can download and install `cpr` using the [Conan](https://conan.io/) package manager. Setup your CMakeLists.txt (see [Conan documentation](https://docs.conan.io/en/latest/integrations/build_system.html) on how to use MSBuild, Meson and others) like this:
-
-```CMake
-project(myproject CXX)
-
-add_executable(${PROJECT_NAME} main.cpp)
-
-include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake) # Include Conan-generated file
-conan_basic_setup(TARGETS) # Introduce Conan-generated targets
-
-target_link_libraries(${PROJECT_NAME} CONAN_PKG::cpr)
-```
-Create `conanfile.txt` in your source dir:
-```
-[requires]
-cpr/1.5.0
-
-[generators]
-cmake
-```
-Install and run Conan, then build your project as always:
-
-```Bash
-pip install conan
-mkdir build
-cd build
-conan install ../ --build=missing
-cmake ../
-cmake --build .
-```
-The `cpr` package in Conan is kept up to date by Conan contributors. If the version is out of date, please [create an issue or pull request](https://github.com/conan-io/conan-center-index) on the `conan-center-index` repository.

vendor/CPR/cpr/curlholder.cpp

@@ -6,9 +6,6 @@ namespace cpr {
 // NOLINTNEXTLINE (cppcoreguidelines-avoid-non-const-global-variables)
 std::mutex CurlHolder::curl_easy_init_mutex_{};
 
-#ifndef _WIN32 // There is no thread sanitizer on windows
-__attribute__((no_sanitize("thread")))
-#endif
 CurlHolder::CurlHolder() {
     /**
      * Allow multithreaded access to CPR by locking curl_easy_init().

vendor/CPR/cpr/proxyauth.cpp

@@ -11,7 +11,6 @@ bool ProxyAuthentication::has(const std::string& protocol) const {
 
 const char* ProxyAuthentication::operator[](const std::string& protocol) {
     return proxyAuth_[protocol].GetAuthString();
-    ;
 }
 
 } // namespace cpr

vendor/CPR/cpr/redirect.cpp

@@ -0,0 +1,40 @@
+#include "cpr/redirect.h"
+
+namespace cpr {
+PostRedirectFlags operator|(PostRedirectFlags lhs, PostRedirectFlags rhs) {
+    return static_cast<PostRedirectFlags>(static_cast<uint8_t>(lhs) | static_cast<uint8_t>(rhs));
+}
+
+PostRedirectFlags operator&(PostRedirectFlags lhs, PostRedirectFlags rhs) {
+    return static_cast<PostRedirectFlags>(static_cast<uint8_t>(lhs) & static_cast<uint8_t>(rhs));
+}
+
+PostRedirectFlags operator^(PostRedirectFlags lhs, PostRedirectFlags rhs) {
+    return static_cast<PostRedirectFlags>(static_cast<uint8_t>(lhs) ^ static_cast<uint8_t>(rhs));
+}
+
+PostRedirectFlags operator~(PostRedirectFlags flag) {
+    return static_cast<PostRedirectFlags>(~static_cast<uint8_t>(flag));
+}
+
+PostRedirectFlags& operator|=(PostRedirectFlags& lhs, PostRedirectFlags rhs) {
+    lhs = static_cast<PostRedirectFlags>(static_cast<uint8_t>(lhs) | static_cast<uint8_t>(rhs));
+    uint8_t tmp = static_cast<uint8_t>(lhs);
+    lhs = static_cast<PostRedirectFlags>(tmp);
+    return lhs;
+}
+
+PostRedirectFlags& operator&=(PostRedirectFlags& lhs, PostRedirectFlags rhs) {
+    lhs = static_cast<PostRedirectFlags>(static_cast<uint8_t>(lhs) & static_cast<uint8_t>(rhs));
+    return lhs;
+}
+
+PostRedirectFlags& operator^=(PostRedirectFlags& lhs, PostRedirectFlags rhs) {
+    lhs = static_cast<PostRedirectFlags>(static_cast<uint8_t>(lhs) ^ static_cast<uint8_t>(rhs));
+    return lhs;
+}
+
+bool any(PostRedirectFlags flag) {
+    return flag != PostRedirectFlags::NONE;
+}
+} // namespace cpr

vendor/CPR/cpr/response.cpp

@@ -35,7 +35,7 @@ std::vector<std::string> Response::GetCertInfo() {
 
     std::vector<std::string> info;
     info.resize(ci->num_of_certs);
-    for (size_t i = 0; i < ci->num_of_certs; i++) {
+    for (int i = 0; i < ci->num_of_certs; i++) {
         // No way around here.
         // NOLINTNEXTLINE (cppcoreguidelines-pro-bounds-pointer-arithmetic)
         info[i] = std::string{ci->certinfo[i]->data};

vendor/CPR/cpr/session.cpp

@@ -49,8 +49,7 @@ class Session::Impl {
     void SetMultipart(Multipart&& multipart);
     void SetMultipart(const Multipart& multipart);
     void SetNTLM(const NTLM& auth);
-    void SetRedirect(const bool& redirect);
+    void SetRedirect(const Redirect& redirect);
-    void SetMaxRedirects(const MaxRedirects& max_redirects);
     void SetCookies(const Cookies& cookies);
     void SetBody(Body&& body);
     void SetBody(const Body& body);
@@ -65,7 +64,9 @@ class Session::Impl {
     void SetUnixSocket(const UnixSocket& unix_socket);
     void SetVerbose(const Verbose& verbose);
     void SetSslOptions(const SslOptions& options);
+    void SetInterface(const Interface& iface);
 
+    cpr_off_t GetDownloadFileLength();
     Response Delete();
     Response Download(const WriteCallback& write);
     Response Download(std::ofstream& file);
@@ -121,9 +122,8 @@ Session::Impl::Impl() : curl_(new CurlHolder()) {
     curl_version_info_data* version_info = curl_version_info(CURLVERSION_NOW);
     std::string version = "curl/" + std::string{version_info->version};
     curl_easy_setopt(curl_->handle, CURLOPT_USERAGENT, version.c_str());
-    curl_easy_setopt(curl_->handle, CURLOPT_FOLLOWLOCATION, 1L);
+    SetRedirect(Redirect());
     curl_easy_setopt(curl_->handle, CURLOPT_NOPROGRESS, 1L);
-    curl_easy_setopt(curl_->handle, CURLOPT_MAXREDIRS, 50L);
     curl_easy_setopt(curl_->handle, CURLOPT_ERRORBUFFER, curl_->error.data());
     curl_easy_setopt(curl_->handle, CURLOPT_COOKIEFILE, "");
 #ifdef CPR_CURL_NOSIGNAL
@@ -209,6 +209,14 @@ void Session::Impl::SetAuth(const Authentication& auth) {
     curl_easy_setopt(curl_->handle, CURLOPT_USERPWD, auth.GetAuthString());
 }
 
+void Session::Impl::SetInterface(const Interface& iface) {
+    if (iface.str().empty()) {
+        curl_easy_setopt(curl_->handle, CURLOPT_INTERFACE, nullptr);
+    } else {
+        curl_easy_setopt(curl_->handle, CURLOPT_INTERFACE, iface.c_str());
+    }
+}
+
 // Only supported with libcurl >= 7.61.0.
 // As an alternative use SetHeader and add the token manually.
 #if LIBCURL_VERSION_NUM >= 0x073D00
@@ -232,16 +240,14 @@ void Session::Impl::SetUserAgent(const UserAgent& ua) {
 void Session::Impl::SetPayload(Payload&& payload) {
     hasBodyOrPayload_ = true;
     const std::string content = payload.GetContent(*curl_);
-    curl_easy_setopt(curl_->handle, CURLOPT_POSTFIELDSIZE_LARGE,
+    curl_easy_setopt(curl_->handle, CURLOPT_POSTFIELDSIZE_LARGE, static_cast<curl_off_t>(content.length()));
-                     static_cast<curl_off_t>(content.length()));
     curl_easy_setopt(curl_->handle, CURLOPT_COPYPOSTFIELDS, content.c_str());
 }
 
 void Session::Impl::SetPayload(const Payload& payload) {
     hasBodyOrPayload_ = true;
     const std::string content = payload.GetContent(*curl_);
-    curl_easy_setopt(curl_->handle, CURLOPT_POSTFIELDSIZE_LARGE,
+    curl_easy_setopt(curl_->handle, CURLOPT_POSTFIELDSIZE_LARGE, static_cast<curl_off_t>(content.length()));
-                     static_cast<curl_off_t>(content.length()));
     curl_easy_setopt(curl_->handle, CURLOPT_COPYPOSTFIELDS, content.c_str());
 }
 
@@ -269,9 +275,7 @@ void Session::Impl::SetMultipart(Multipart&& multipart) {
         std::vector<curl_forms> formdata;
         if (part.is_buffer) {
             // Do not use formdata, to prevent having to use reinterpreter_cast:
-            curl_formadd(&formpost, &lastptr, CURLFORM_COPYNAME, part.name.c_str(), CURLFORM_BUFFER,
+            curl_formadd(&formpost, &lastptr, CURLFORM_COPYNAME, part.name.c_str(), CURLFORM_BUFFER, part.value.c_str(), CURLFORM_BUFFERPTR, part.data, CURLFORM_BUFFERLENGTH, part.datalen, CURLFORM_END);
-                         part.value.c_str(), CURLFORM_BUFFERPTR, part.data, CURLFORM_BUFFERLENGTH,
-                         part.datalen, CURLFORM_END);
         } else {
             formdata.push_back({CURLFORM_COPYNAME, part.name.c_str()});
             if (part.is_file) {
@@ -302,9 +306,7 @@ void Session::Impl::SetMultipart(const Multipart& multipart) {
         std::vector<curl_forms> formdata;
         if (part.is_buffer) {
             // Do not use formdata, to prevent having to use reinterpreter_cast:
-            curl_formadd(&formpost, &lastptr, CURLFORM_COPYNAME, part.name.c_str(), CURLFORM_BUFFER,
+            curl_formadd(&formpost, &lastptr, CURLFORM_COPYNAME, part.name.c_str(), CURLFORM_BUFFER, part.value.c_str(), CURLFORM_BUFFERPTR, part.data, CURLFORM_BUFFERLENGTH, part.datalen, CURLFORM_END);
-                         part.value.c_str(), CURLFORM_BUFFERPTR, part.data, CURLFORM_BUFFERLENGTH,
-                         part.datalen, CURLFORM_END);
         } else {
             formdata.push_back({CURLFORM_COPYNAME, part.name.c_str()});
             if (part.is_file) {
@@ -338,12 +340,22 @@ void Session::Impl::SetNTLM(const NTLM& auth) {
     curl_easy_setopt(curl_->handle, CURLOPT_USERPWD, auth.GetAuthString());
 }
 
-void Session::Impl::SetRedirect(const bool& redirect) {
+void Session::Impl::SetRedirect(const Redirect& redirect) {
-    curl_easy_setopt(curl_->handle, CURLOPT_FOLLOWLOCATION, std::int32_t(redirect));
+    curl_easy_setopt(curl_->handle, CURLOPT_FOLLOWLOCATION, redirect.follow ? 1L : 0L);
-}
+    curl_easy_setopt(curl_->handle, CURLOPT_MAXREDIRS, redirect.maximum);
 
-void Session::Impl::SetMaxRedirects(const MaxRedirects& max_redirects) {
+    // NOLINTNEXTLINE (google-runtime-int)
-    curl_easy_setopt(curl_->handle, CURLOPT_MAXREDIRS, max_redirects.number_of_redirects);
+    long mask = 0;
+    if (any(redirect.post_flags & PostRedirectFlags::POST_301)) {
+        mask |= CURL_REDIR_POST_301;
+    }
+    if (any(redirect.post_flags & PostRedirectFlags::POST_302)) {
+        mask |= CURL_REDIR_POST_302;
+    }
+    if (any(redirect.post_flags & PostRedirectFlags::POST_303)) {
+        mask |= CURL_REDIR_POST_303;
+    }
+    curl_easy_setopt(curl_->handle, CURLOPT_POSTREDIR, mask);
 }
 
 void Session::Impl::SetCookies(const Cookies& cookies) {
@@ -353,15 +365,13 @@ void Session::Impl::SetCookies(const Cookies& cookies) {
 
 void Session::Impl::SetBody(Body&& body) {
     hasBodyOrPayload_ = true;
-    curl_easy_setopt(curl_->handle, CURLOPT_POSTFIELDSIZE_LARGE,
+    curl_easy_setopt(curl_->handle, CURLOPT_POSTFIELDSIZE_LARGE, static_cast<curl_off_t>(body.str().length()));
-                     static_cast<curl_off_t>(body.str().length()));
     curl_easy_setopt(curl_->handle, CURLOPT_COPYPOSTFIELDS, body.c_str());
 }
 
 void Session::Impl::SetBody(const Body& body) {
     hasBodyOrPayload_ = true;
-    curl_easy_setopt(curl_->handle, CURLOPT_POSTFIELDSIZE_LARGE,
+    curl_easy_setopt(curl_->handle, CURLOPT_POSTFIELDSIZE_LARGE, static_cast<curl_off_t>(body.str().length()));
-                     static_cast<curl_off_t>(body.str().length()));
     curl_easy_setopt(curl_->handle, CURLOPT_POSTFIELDS, body.c_str());
 }
 
@@ -449,13 +459,15 @@ void Session::Impl::SetSslOptions(const SslOptions& options) {
 #if LIBCURL_VERSION_NUM >= 0x072900
     curl_easy_setopt(curl_->handle, CURLOPT_SSL_VERIFYSTATUS, options.verify_status ? ON : OFF);
 #endif
+
+    int maxTlsVersion = options.ssl_version;
+#if SUPPORT_MAX_TLS_VERSION
+    maxTlsVersion |= options.max_version;
+#endif
+
     curl_easy_setopt(curl_->handle, CURLOPT_SSLVERSION,
                      // Ignore here since this has been defined by libcurl.
-                     options.ssl_version
+                     maxTlsVersion);
-#if SUPPORT_MAX_TLS_VERSION
-                             | options.max_version
-#endif
-    );
 #if SUPPORT_SSL_NO_REVOKE
     if (options.ssl_no_revoke) {
         curl_easy_setopt(curl_->handle, CURLOPT_SSL_OPTIONS, CURLSSLOPT_NO_REVOKE);
@@ -479,8 +491,7 @@ void Session::Impl::SetSslOptions(const SslOptions& options) {
     }
 #endif
 #if SUPPORT_SESSIONID_CACHE
-    curl_easy_setopt(curl_->handle, CURLOPT_SSL_SESSIONID_CACHE,
+    curl_easy_setopt(curl_->handle, CURLOPT_SSL_SESSIONID_CACHE, options.session_id_cache ? ON : OFF);
-                     options.session_id_cache ? ON : OFF);
 #endif
 }
 
@@ -491,6 +502,27 @@ void Session::Impl::PrepareDelete() {
     prepareCommon();
 }
 
+cpr_off_t Session::Impl::GetDownloadFileLength() {
+    cpr_off_t downloadFileLenth = -1;
+    curl_easy_setopt(curl_->handle, CURLOPT_URL, url_.c_str());
+
+    std::string protocol = url_.str().substr(0, url_.str().find(':'));
+    if (proxies_.has(protocol)) {
+        curl_easy_setopt(curl_->handle, CURLOPT_PROXY, proxies_[protocol].c_str());
+        if (proxyAuth_.has(protocol)) {
+            curl_easy_setopt(curl_->handle, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
+            curl_easy_setopt(curl_->handle, CURLOPT_PROXYUSERPWD, proxyAuth_[protocol]);
+        }
+    }
+
+    curl_easy_setopt(curl_->handle, CURLOPT_HTTPGET, 1);
+    curl_easy_setopt(curl_->handle, CURLOPT_NOBODY, 1);
+    if (curl_easy_perform(curl_->handle) == CURLE_OK) {
+        curl_easy_getinfo(curl_->handle, CURLINFO_CONTENT_LENGTH_DOWNLOAD_T, &downloadFileLenth);
+    }
+    return downloadFileLenth;
+}
+
 Response Session::Impl::Delete() {
     PrepareDelete();
     return makeRequest();
@@ -498,7 +530,7 @@ Response Session::Impl::Delete() {
 
 Response Session::Impl::Download(const WriteCallback& write) {
     curl_easy_setopt(curl_->handle, CURLOPT_NOBODY, 0L);
-    curl_easy_setopt(curl_->handle, CURLOPT_CUSTOMREQUEST, "GET");
+    curl_easy_setopt(curl_->handle, CURLOPT_HTTPGET, 1);
 
     SetWriteCallback(write);
 
@@ -507,7 +539,7 @@ Response Session::Impl::Download(const WriteCallback& write) {
 
 Response Session::Impl::Download(std::ofstream& file) {
     curl_easy_setopt(curl_->handle, CURLOPT_NOBODY, 0L);
-    curl_easy_setopt(curl_->handle, CURLOPT_CUSTOMREQUEST, "GET");
+    curl_easy_setopt(curl_->handle, CURLOPT_HTTPGET, 1);
     curl_easy_setopt(curl_->handle, CURLOPT_WRITEFUNCTION, cpr::util::writeFileFunction);
     curl_easy_setopt(curl_->handle, CURLOPT_WRITEDATA, &file);
 
@@ -525,7 +557,7 @@ void Session::Impl::PrepareGet() {
         curl_easy_setopt(curl_->handle, CURLOPT_CUSTOMREQUEST, nullptr);
         curl_easy_setopt(curl_->handle, CURLOPT_HTTPGET, 1L);
     }
-	prepareCommon();
+    prepareCommon();
 }
 
 Response Session::Impl::Get() {
@@ -536,7 +568,7 @@ Response Session::Impl::Get() {
 void Session::Impl::PrepareHead() {
     curl_easy_setopt(curl_->handle, CURLOPT_NOBODY, 1L);
     curl_easy_setopt(curl_->handle, CURLOPT_CUSTOMREQUEST, nullptr);
-	 prepareCommon();
+    prepareCommon();
 }
 
 Response Session::Impl::Head() {
@@ -587,7 +619,7 @@ Response Session::Impl::Post() {
 void Session::Impl::PreparePut() {
     curl_easy_setopt(curl_->handle, CURLOPT_NOBODY, 0L);
     curl_easy_setopt(curl_->handle, CURLOPT_CUSTOMREQUEST, "PUT");
-	prepareCommon();
+    prepareCommon();
 }
 
 Response Session::Impl::Put() {
@@ -616,8 +648,6 @@ Response Session::Impl::makeDownloadRequest() {
             curl_easy_setopt(curl_->handle, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
             curl_easy_setopt(curl_->handle, CURLOPT_PROXYUSERPWD, proxyAuth_[protocol]);
         }
-    } else {
-        curl_easy_setopt(curl_->handle, CURLOPT_PROXY, "");
     }
 
     curl_->error[0] = '\0';
@@ -633,14 +663,18 @@ Response Session::Impl::makeDownloadRequest() {
 
     CURLcode curl_error = curl_easy_perform(curl_->handle);
 
+    if (!headercb_.callback) {
+        curl_easy_setopt(curl_->handle, CURLOPT_HEADERFUNCTION, nullptr);
+        curl_easy_setopt(curl_->handle, CURLOPT_HEADERDATA, 0);
+    }
+
     curl_slist* raw_cookies{nullptr};
     curl_easy_getinfo(curl_->handle, CURLINFO_COOKIELIST, &raw_cookies);
     Cookies cookies = util::parseCookies(raw_cookies);
     curl_slist_free_all(raw_cookies);
     std::string errorMsg = curl_->error.data();
 
-    return Response(curl_, "", std::move(header_string), std::move(cookies),
+    return Response(curl_, "", std::move(header_string), std::move(cookies), Error(curl_error, std::move(errorMsg)));
-                    Error(curl_error, std::move(errorMsg)));
 }
 
 void Session::Impl::prepareCommon() {
@@ -665,8 +699,6 @@ void Session::Impl::prepareCommon() {
             curl_easy_setopt(curl_->handle, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
             curl_easy_setopt(curl_->handle, CURLOPT_PROXYUSERPWD, proxyAuth_[protocol]);
         }
-    } else {
-        curl_easy_setopt(curl_->handle, CURLOPT_PROXY, nullptr);
     }
 
 #if LIBCURL_VERSION_MAJOR >= 7
@@ -700,14 +732,12 @@ void Session::Impl::prepareCommon() {
     curl_easy_setopt(curl_->handle, CURLOPT_CERTINFO, 1L);
 }
 
-Response Session::Impl::makeRequest()
+Response Session::Impl::makeRequest() {
-{
     CURLcode curl_error = curl_easy_perform(curl_->handle);
     return Complete(curl_error);
 }
 
-Response Session::Impl::Complete(CURLcode curl_error)
+Response Session::Impl::Complete(CURLcode curl_error) {
-{
     curl_slist* raw_cookies{nullptr};
     curl_easy_getinfo(curl_->handle, CURLINFO_COOKIELIST, &raw_cookies);
     Cookies cookies = util::parseCookies(raw_cookies);
@@ -717,13 +747,12 @@ Response Session::Impl::Complete(CURLcode curl_error)
     hasBodyOrPayload_ = false;
 
     std::string errorMsg = curl_->error.data();
-    return Response(curl_, std::move(response_string_), std::move(header_string_), std::move(cookies),
+    return Response(curl_, std::move(response_string_), std::move(header_string_), std::move(cookies), Error(curl_error, std::move(errorMsg)));
-                    Error(curl_error, std::move(errorMsg)));
 }
 
 // clang-format off
 Session::Session() : pimpl_(new Impl()) {}
-Session::Session(Session&& old) noexcept = default;
+Session::Session(Session&& /*old*/) noexcept = default;
 Session::~Session() = default;
 Session& Session::operator=(Session&& old) noexcept = default;
 void Session::SetReadCallback(const ReadCallback& read) { pimpl_->SetReadCallback(read); }
@@ -750,8 +779,7 @@ void Session::SetProxyAuth(const ProxyAuthentication& proxy_auth) { pimpl_->SetP
 void Session::SetMultipart(const Multipart& multipart) { pimpl_->SetMultipart(multipart); }
 void Session::SetMultipart(Multipart&& multipart) { pimpl_->SetMultipart(std::move(multipart)); }
 void Session::SetNTLM(const NTLM& auth) { pimpl_->SetNTLM(auth); }
-void Session::SetRedirect(const bool& redirect) { pimpl_->SetRedirect(redirect); }
+void Session::SetRedirect(const Redirect& redirect) { pimpl_->SetRedirect(redirect); }
-void Session::SetMaxRedirects(const MaxRedirects& max_redirects) { pimpl_->SetMaxRedirects(max_redirects); }
 void Session::SetCookies(const Cookies& cookies) { pimpl_->SetCookies(cookies); }
 void Session::SetBody(const Body& body) { pimpl_->SetBody(body); }
 void Session::SetBody(Body&& body) { pimpl_->SetBody(std::move(body)); }
@@ -760,6 +788,7 @@ void Session::SetVerifySsl(const VerifySsl& verify) { pimpl_->SetVerifySsl(verif
 void Session::SetUnixSocket(const UnixSocket& unix_socket) { pimpl_->SetUnixSocket(unix_socket); }
 void Session::SetSslOptions(const SslOptions& options) { pimpl_->SetSslOptions(options); }
 void Session::SetVerbose(const Verbose& verbose) { pimpl_->SetVerbose(verbose); }
+void Session::SetInterface(const Interface& iface) { pimpl_->SetInterface(iface); }
 void Session::SetOption(const ReadCallback& read) { pimpl_->SetReadCallback(read); }
 void Session::SetOption(const HeaderCallback& header) { pimpl_->SetHeaderCallback(header); }
 void Session::SetOption(const WriteCallback& write) { pimpl_->SetWriteCallback(write); }
@@ -789,8 +818,7 @@ void Session::SetOption(const ProxyAuthentication& proxy_auth) { pimpl_->SetProx
 void Session::SetOption(const Multipart& multipart) { pimpl_->SetMultipart(multipart); }
 void Session::SetOption(Multipart&& multipart) { pimpl_->SetMultipart(std::move(multipart)); }
 void Session::SetOption(const NTLM& auth) { pimpl_->SetNTLM(auth); }
-void Session::SetOption(const bool& redirect) { pimpl_->SetRedirect(redirect); }
+void Session::SetOption(const Redirect& redirect) { pimpl_->SetRedirect(redirect); }
-void Session::SetOption(const MaxRedirects& max_redirects) { pimpl_->SetMaxRedirects(max_redirects); }
 void Session::SetOption(const Cookies& cookies) { pimpl_->SetCookies(cookies); }
 void Session::SetOption(const Body& body) { pimpl_->SetBody(body); }
 void Session::SetOption(Body&& body) { pimpl_->SetBody(std::move(body)); }
@@ -799,7 +827,9 @@ void Session::SetOption(const VerifySsl& verify) { pimpl_->SetVerifySsl(verify);
 void Session::SetOption(const Verbose& verbose) { pimpl_->SetVerbose(verbose); }
 void Session::SetOption(const UnixSocket& unix_socket) { pimpl_->SetUnixSocket(unix_socket); }
 void Session::SetOption(const SslOptions& options) { pimpl_->SetSslOptions(options); }
+void Session::SetOption(const Interface& iface) { pimpl_->SetInterface(iface); }
 
+cpr_off_t Session::GetDownloadFileLength() { return pimpl_->GetDownloadFileLength(); }
 Response Session::Delete() { return pimpl_->Delete(); }
 Response Session::Download(const WriteCallback& write) { return pimpl_->Download(write); }
 Response Session::Download(std::ofstream& file) { return pimpl_->Download(file); }

vendor/CPR/cpr/timeout.cpp

@@ -2,28 +2,25 @@
 
 #include <limits>
 #include <stdexcept>
-#include <type_traits>
 #include <string>
+#include <type_traits>
 
 namespace cpr {
 
 // No way around since curl uses a long here.
 // NOLINTNEXTLINE(google-runtime-int)
 long Timeout::Milliseconds() const {
-    static_assert(std::is_same<std::chrono::milliseconds, decltype(ms)>::value,
+    static_assert(std::is_same<std::chrono::milliseconds, decltype(ms)>::value, "Following casting expects milliseconds.");
-                  "Following casting expects milliseconds.");
 
     // No way around since curl uses a long here.
     // NOLINTNEXTLINE(google-runtime-int)
     if (ms.count() > std::numeric_limits<long>::max()) {
-        throw std::overflow_error(
+        throw std::overflow_error("cpr::Timeout: timeout value overflow: " + std::to_string(ms.count()) + " ms.");
-                "cpr::Timeout: timeout value overflow: " + std::to_string(ms.count()) + " ms.");
     }
     // No way around since curl uses a long here.
     // NOLINTNEXTLINE(google-runtime-int)
     if (ms.count() < std::numeric_limits<long>::min()) {
-        throw std::underflow_error(
+        throw std::underflow_error("cpr::Timeout: timeout value underflow: " + std::to_string(ms.count()) + " ms.");
-                "cpr::Timeout: timeout value underflow: " + std::to_string(ms.count()) + " ms.");
     }
 
     // No way around since curl uses a long here.

vendor/CPR/cpr/util.cpp

@@ -89,12 +89,12 @@ std::vector<std::string> split(const std::string& to_split, char delimiter) {
 
 size_t readUserFunction(char* ptr, size_t size, size_t nitems, const ReadCallback* read) {
     size *= nitems;
-    return read->callback(ptr, size) ? size : CURL_READFUNC_ABORT;
+    return (*read)(ptr, size) ? size : CURL_READFUNC_ABORT;
 }
 
 size_t headerUserFunction(char* ptr, size_t size, size_t nmemb, const HeaderCallback* header) {
     size *= nmemb;
-    return header->callback({ptr, size}) ? size : 0;
+    return (*header)({ptr, size}) ? size : 0;
 }
 
 size_t writeFunction(char* ptr, size_t size, size_t nmemb, std::string* data) {
@@ -111,7 +111,7 @@ size_t writeFileFunction(char* ptr, size_t size, size_t nmemb, std::ofstream* fi
 
 size_t writeUserFunction(char* ptr, size_t size, size_t nmemb, const WriteCallback* write) {
     size *= nmemb;
-    return write->callback({ptr, size}) ? size : 0;
+    return (*write)({ptr, size}) ? size : 0;
 }
 
 #if LIBCURL_VERSION_NUM < 0x072000
@@ -121,12 +121,12 @@ int progressUserFunction(const ProgressCallback* progress, double dltotal, doubl
 int progressUserFunction(const ProgressCallback* progress, curl_off_t dltotal, curl_off_t dlnow,
                          curl_off_t ultotal, curl_off_t ulnow) {
 #endif
-    return progress->callback(dltotal, dlnow, ultotal, ulnow) ? 0 : 1;
+    return (*progress)(dltotal, dlnow, ultotal, ulnow) ? 0 : 1;
 }
 
 int debugUserFunction(CURL* /*handle*/, curl_infotype type, char* data, size_t size,
                       const DebugCallback* debug) {
-    debug->callback(DebugCallback::InfoType(type), std::string(data, size));
+    (*debug)(DebugCallback::InfoType(type), std::string(data, size));
     return 0;
 }
 

vendor/CPR/include/cpr/callback.h

@@ -12,46 +12,54 @@ class ReadCallback {
   public:
     ReadCallback() = default;
     // NOLINTNEXTLINE(google-explicit-constructor, hicpp-explicit-conversions)
-    ReadCallback(std::function<bool(char* buffer, size_t& size)> p_callback)
+    ReadCallback(std::function<bool(char* buffer, size_t& size, intptr_t userdata)> p_callback, intptr_t p_userdata = 0) : userdata(p_userdata), size{-1}, callback{std::move(p_callback)} {}
-            : size{-1}, callback{std::move(p_callback)} {}
+    ReadCallback(cpr_off_t p_size, std::function<bool(char* buffer, size_t& size, intptr_t userdata)> p_callback, intptr_t p_userdata = 0) : userdata(p_userdata), size{p_size}, callback{std::move(p_callback)} {}
-    ReadCallback(cpr_off_t p_size, std::function<bool(char* buffer, size_t& size)> p_callback)
+    bool operator()(char* buffer, size_t& size) const {
-            : size{p_size}, callback{std::move(p_callback)} {}
+        return callback(buffer, size, userdata);
+    }
 
+    intptr_t userdata;
     cpr_off_t size{};
-    std::function<bool(char* buffer, size_t& size)> callback;
+    std::function<bool(char* buffer, size_t& size, intptr_t userdata)> callback;
 };
 
 class HeaderCallback {
   public:
     HeaderCallback() = default;
     // NOLINTNEXTLINE(google-explicit-constructor, hicpp-explicit-conversions)
-    HeaderCallback(std::function<bool(std::string header)> p_callback)
+    HeaderCallback(std::function<bool(std::string header, intptr_t userdata)> p_callback, intptr_t p_userdata = 0) : userdata(p_userdata), callback(std::move(p_callback)) {}
-            : callback(std::move(p_callback)) {}
+    bool operator()(std::string header) const {
+        return callback(std::move(header), userdata);
+    }
 
-    std::function<bool(std::string header)> callback;
+    intptr_t userdata;
+    std::function<bool(std::string header, intptr_t userdata)> callback;
 };
 
 class WriteCallback {
   public:
     WriteCallback() = default;
     // NOLINTNEXTLINE(google-explicit-constructor, hicpp-explicit-conversions)
-    WriteCallback(std::function<bool(std::string data)> p_callback) : callback(std::move(p_callback)) {}
+    WriteCallback(std::function<bool(std::string data, intptr_t userdata)> p_callback, intptr_t p_userdata = 0) : userdata(p_userdata), callback(std::move(p_callback)) {}
+    bool operator()(std::string data) const {
+        return callback(std::move(data), userdata);
+    }
 
-    std::function<bool(std::string data)> callback;
+    intptr_t userdata;
+    std::function<bool(std::string data, intptr_t userdata)> callback;
 };
 
 class ProgressCallback {
   public:
     ProgressCallback() = default;
     // NOLINTNEXTLINE(google-explicit-constructor, hicpp-explicit-conversions)
-    ProgressCallback(std::function<bool(size_t downloadTotal, size_t downloadNow,
+    ProgressCallback(std::function<bool(cpr_off_t downloadTotal, cpr_off_t downloadNow, cpr_off_t uploadTotal, cpr_off_t uploadNow, intptr_t userdata)> p_callback, intptr_t p_userdata = 0) : userdata(p_userdata), callback(std::move(p_callback)) {}
-                                        size_t uploadTotal, size_t uploadNow)>
+    bool operator()(cpr_off_t downloadTotal, cpr_off_t downloadNow, cpr_off_t uploadTotal, cpr_off_t uploadNow) const {
-                             p_callback)
+        return callback(downloadTotal, downloadNow, uploadTotal, uploadNow, userdata);
-            : callback(std::move(p_callback)) {}
+    }
 
-    std::function<bool(size_t downloadTotal, size_t downloadNow, size_t uploadTotal,
+    intptr_t userdata;
-                       size_t uploadNow)>
+    std::function<bool(size_t downloadTotal, size_t downloadNow, size_t uploadTotal, size_t uploadNow, intptr_t userdata)> callback;
-            callback;
 };
 
 class DebugCallback {
@@ -67,10 +75,13 @@ class DebugCallback {
     };
     DebugCallback() = default;
     // NOLINTNEXTLINE(google-explicit-constructor, hicpp-explicit-conversions)
-    DebugCallback(std::function<void(InfoType type, std::string data)> p_callback)
+    DebugCallback(std::function<void(InfoType type, std::string data, intptr_t userdata)> p_callback, intptr_t p_userdata = 0) : userdata(p_userdata), callback(std::move(p_callback)) {}
-            : callback(std::move(p_callback)) {}
+    void operator()(InfoType type, std::string data) const {
+        callback(type, std::move(data), userdata);
+    }
 
-    std::function<void(InfoType type, std::string data)> callback;
+    intptr_t userdata;
+    std::function<void(InfoType type, std::string data, intptr_t userdata)> callback;
 };
 
 } // namespace cpr

vendor/CPR/include/cpr/cpr.h

@@ -4,6 +4,8 @@
 #include "cpr/api.h"
 #include "cpr/auth.h"
 #include "cpr/cprtypes.h"
+#include "cpr/interface.h"
+#include "cpr/redirect.h"
 #include "cpr/response.h"
 #include "cpr/session.h"
 #include "cpr/status_codes.h"

vendor/CPR/include/cpr/interface.h

@@ -0,0 +1,32 @@
+#ifndef CPR_INTERFACE_H
+#define CPR_INTERFACE_H
+
+#include <initializer_list>
+#include <string>
+
+#include "cpr/cprtypes.h"
+
+namespace cpr {
+
+class Interface : public StringHolder<Interface> {
+  public:
+    Interface() : StringHolder<Interface>() {}
+    // NOLINTNEXTLINE(google-explicit-constructor, hicpp-explicit-conversions)
+    Interface(const std::string& iface) : StringHolder<Interface>(iface) {}
+    // NOLINTNEXTLINE(google-explicit-constructor, hicpp-explicit-conversions)
+    Interface(std::string&& iface) : StringHolder<Interface>(std::move(iface)) {}
+    // NOLINTNEXTLINE(google-explicit-constructor, hicpp-explicit-conversions)
+    Interface(const char* iface) : StringHolder<Interface>(iface) {}
+    Interface(const char* str, size_t len) : StringHolder<Interface>(str, len) {}
+    Interface(const std::initializer_list<std::string> args) : StringHolder<Interface>(args) {}
+    Interface(const Interface& other) = default;
+    Interface(Interface&& old) noexcept = default;
+    ~Interface() override = default;
+
+    Interface& operator=(Interface&& old) noexcept = default;
+    Interface& operator=(const Interface& other) = default;
+};
+
+} // namespace cpr
+
+#endif

vendor/CPR/include/cpr/max_redirects.h

@@ -1,18 +0,0 @@
-#ifndef CPR_MAX_REDIRECTS_H
-#define CPR_MAX_REDIRECTS_H
-
-#include <cstdint>
-
-namespace cpr {
-
-class MaxRedirects {
-  public:
-    explicit MaxRedirects(const std::int32_t p_number_of_redirects)
-            : number_of_redirects(p_number_of_redirects) {}
-
-    std::int32_t number_of_redirects;
-};
-
-} // namespace cpr
-
-#endif

vendor/CPR/include/cpr/redirect.h

@@ -0,0 +1,77 @@
+#ifndef CPR_REDIRECT_H
+#define CPR_REDIRECT_H
+
+#include <cstdint>
+
+namespace cpr {
+enum class PostRedirectFlags : uint8_t {
+    /**
+     * Respect RFC 7231 (section 6.4.2 to 6.4.4).
+     * Same as CURL_REDIR_POST_301 (https://curl.se/libcurl/c/CURLOPT_POSTREDIR.html).
+     **/
+    POST_301 = 0x1 << 0,
+    /**
+     * Maintain the request method after a 302 redirect.
+     * Same as CURL_REDIR_POST_302 (https://curl.se/libcurl/c/CURLOPT_POSTREDIR.html).
+     **/
+    POST_302 = 0x1 << 1,
+    /**
+     * Maintain the request method after a 303 redirect.
+     * Same as CURL_REDIR_POST_303 (https://curl.se/libcurl/c/CURLOPT_POSTREDIR.html).
+     **/
+    POST_303 = 0x1 << 2,
+    /**
+     * Default value.
+     * Convenience option to enable all flags.
+     * Same as CURL_REDIR_POST_ALL (https://curl.se/libcurl/c/CURLOPT_POSTREDIR.html).
+     **/
+    POST_ALL = POST_301 | POST_302 | POST_303,
+    /**
+     * * Convenience option to disable all flags.
+     **/
+    NONE = 0x0
+};
+
+PostRedirectFlags operator|(PostRedirectFlags lhs, PostRedirectFlags rhs);
+PostRedirectFlags operator&(PostRedirectFlags lhs, PostRedirectFlags rhs);
+PostRedirectFlags operator^(PostRedirectFlags lhs, PostRedirectFlags rhs);
+PostRedirectFlags operator~(PostRedirectFlags flag);
+PostRedirectFlags& operator|=(PostRedirectFlags& lhs, PostRedirectFlags rhs);
+PostRedirectFlags& operator&=(PostRedirectFlags& lhs, PostRedirectFlags rhs);
+PostRedirectFlags& operator^=(PostRedirectFlags& lhs, PostRedirectFlags rhs);
+bool any(PostRedirectFlags flag);
+
+class Redirect {
+  public:
+    /**
+     * The maximum number of redirects to follow.
+     * 0: Refuse any redirects.
+     * -1: Infinite number of redirects.
+     * Default: 50
+     * https://curl.se/libcurl/c/CURLOPT_MAXREDIRS.html
+     **/
+    // NOLINTNEXTLINE (cppcoreguidelines-avoid-magic-numbers, google-runtime-int)
+    long maximum{50L};
+    /**
+     * Follow 3xx redirects.
+     * Default: true
+     * https://curl.se/libcurl/c/CURLOPT_FOLLOWLOCATION.html
+     **/
+    bool follow{true};
+    /**
+     * Flags to control how to act after a redirect for a post request.
+     * Default: POST_ALL
+     **/
+    PostRedirectFlags post_flags{PostRedirectFlags::POST_ALL};
+
+    Redirect() = default;
+    // NOLINTNEXTLINE (google-runtime-int)
+    Redirect(long p_maximum, bool p_follow, PostRedirectFlags p_post_flags) : maximum(p_maximum), follow(p_follow), post_flags(p_post_flags){};
+    // NOLINTNEXTLINE (google-runtime-int)
+    explicit Redirect(long p_maximum) : maximum(p_maximum){};
+    explicit Redirect(bool p_follow) : follow(p_follow){};
+    explicit Redirect(PostRedirectFlags p_post_flags) : post_flags(p_post_flags){};
+};
+} // namespace cpr
+
+#endif

vendor/CPR/include/cpr/session.h

@@ -14,15 +14,16 @@
 #include "cpr/cprtypes.h"
 #include "cpr/curlholder.h"
 #include "cpr/digest.h"
+#include "cpr/interface.h"
 #include "cpr/limit_rate.h"
 #include "cpr/low_speed.h"
-#include "cpr/max_redirects.h"
 #include "cpr/multipart.h"
 #include "cpr/ntlm.h"
 #include "cpr/parameters.h"
 #include "cpr/payload.h"
 #include "cpr/proxies.h"
 #include "cpr/proxyauth.h"
+#include "cpr/redirect.h"
 #include "cpr/response.h"
 #include "cpr/ssl_options.h"
 #include "cpr/timeout.h"
@@ -62,8 +63,7 @@ class Session {
     void SetMultipart(Multipart&& multipart);
     void SetMultipart(const Multipart& multipart);
     void SetNTLM(const NTLM& auth);
-    void SetRedirect(const bool& redirect);
+    void SetRedirect(const Redirect& redirect);
-    void SetMaxRedirects(const MaxRedirects& max_redirects);
     void SetCookies(const Cookies& cookies);
     void SetBody(Body&& body);
     void SetBody(const Body& body);
@@ -77,6 +77,7 @@ class Session {
     void SetProgressCallback(const ProgressCallback& progress);
     void SetDebugCallback(const DebugCallback& debug);
     void SetVerbose(const Verbose& verbose);
+    void SetInterface(const Interface& iface);
 
     // Used in templated functions
     void SetOption(const Url& url);
@@ -103,8 +104,7 @@ class Session {
     void SetOption(Multipart&& multipart);
     void SetOption(const Multipart& multipart);
     void SetOption(const NTLM& auth);
-    void SetOption(const bool& redirect);
+    void SetOption(const Redirect& redirect);
-    void SetOption(const MaxRedirects& max_redirects);
     void SetOption(const Cookies& cookies);
     void SetOption(Body&& body);
     void SetOption(const Body& body);
@@ -118,7 +118,9 @@ class Session {
     void SetOption(const Verbose& verbose);
     void SetOption(const UnixSocket& unix_socket);
     void SetOption(const SslOptions& options);
+    void SetOption(const Interface& iface);
 
+    cpr_off_t GetDownloadFileLength();
     Response Delete();
     Response Download(const WriteCallback& write);
     Response Download(std::ofstream& file);