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#include "Http.hpp"
#include <cstdlib>
#include <functional>
#include <thread>
#include <deque>
#include <sstream>
#include <boost/filesystem/fstream.hpp>
#include <boost/format.hpp>
#include <curl/curl.h>
#include "../../libslic3r/libslic3r.h"
namespace fs = boost::filesystem;
namespace Slic3r {
// Private
class CurlGlobalInit
{
static const CurlGlobalInit instance;
CurlGlobalInit() { ::curl_global_init(CURL_GLOBAL_DEFAULT); }
~CurlGlobalInit() { ::curl_global_cleanup(); }
};
struct Http::priv
{
enum {
DEFAULT_SIZE_LIMIT = 5 * 1024 * 1024,
};
::CURL *curl;
::curl_httppost *form;
::curl_httppost *form_end;
::curl_slist *headerlist;
// Used for reading the body
std::string buffer;
// Used for storing file streams added as multipart form parts
// Using a deque here because unlike vector it doesn't ivalidate pointers on insertion
std::deque<fs::ifstream> form_files;
std::string postfields;
size_t limit;
bool cancel;
std::thread io_thread;
Http::CompleteFn completefn;
Http::ErrorFn errorfn;
Http::ProgressFn progressfn;
priv(const std::string &url);
~priv();
static bool ca_file_supported(::CURL *curl);
static size_t writecb(void *data, size_t size, size_t nmemb, void *userp);
static int xfercb(void *userp, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow);
static int xfercb_legacy(void *userp, double dltotal, double dlnow, double ultotal, double ulnow);
static size_t form_file_read_cb(char *buffer, size_t size, size_t nitems, void *userp);
void form_add_file(const char *name, const fs::path &path, const char* filename);
void set_post_body(const fs::path &path);
std::string curl_error(CURLcode curlcode);
std::string body_size_error();
void http_perform();
};
Http::priv::priv(const std::string &url) :
curl(::curl_easy_init()),
form(nullptr),
form_end(nullptr),
headerlist(nullptr),
limit(0),
cancel(false)
{
if (curl == nullptr) {
throw std::runtime_error(std::string("Could not construct Curl object"));
}
::curl_easy_setopt(curl, CURLOPT_URL, url.c_str()); // curl makes a copy internally
::curl_easy_setopt(curl, CURLOPT_USERAGENT, SLIC3R_FORK_NAME "/" SLIC3R_VERSION);
}
Http::priv::~priv()
{
::curl_easy_cleanup(curl);
::curl_formfree(form);
::curl_slist_free_all(headerlist);
}
bool Http::priv::ca_file_supported(::CURL *curl)
{
#ifdef _WIN32
bool res = false;
#else
bool res = true;
#endif
if (curl == nullptr) { return res; }
#if LIBCURL_VERSION_MAJOR >= 7 && LIBCURL_VERSION_MINOR >= 48
::curl_tlssessioninfo *tls;
if (::curl_easy_getinfo(curl, CURLINFO_TLS_SSL_PTR, &tls) == CURLE_OK) {
if (tls->backend == CURLSSLBACKEND_SCHANNEL || tls->backend == CURLSSLBACKEND_DARWINSSL) {
// With Windows and OS X native SSL support, cert files cannot be set
res = false;
}
}
#endif
return res;
}
size_t Http::priv::writecb(void *data, size_t size, size_t nmemb, void *userp)
{
auto self = static_cast<priv*>(userp);
const char *cdata = static_cast<char*>(data);
const size_t realsize = size * nmemb;
const size_t limit = self->limit > 0 ? self->limit : DEFAULT_SIZE_LIMIT;
if (self->buffer.size() + realsize > limit) {
// This makes curl_easy_perform return CURLE_WRITE_ERROR
return 0;
}
self->buffer.append(cdata, realsize);
return realsize;
}
int Http::priv::xfercb(void *userp, curl_off_t dltotal, curl_off_t dlnow, curl_off_t ultotal, curl_off_t ulnow)
{
auto self = static_cast<priv*>(userp);
bool cb_cancel = false;
if (self->progressfn) {
Progress progress(dltotal, dlnow, ultotal, ulnow);
self->progressfn(progress, cb_cancel);
}
return self->cancel || cb_cancel;
}
int Http::priv::xfercb_legacy(void *userp, double dltotal, double dlnow, double ultotal, double ulnow)
{
return xfercb(userp, dltotal, dlnow, ultotal, ulnow);
}
size_t Http::priv::form_file_read_cb(char *buffer, size_t size, size_t nitems, void *userp)
{
auto stream = reinterpret_cast<fs::ifstream*>(userp);
try {
stream->read(buffer, size * nitems);
} catch (...) {
return CURL_READFUNC_ABORT;
}
return stream->gcount();
}
void Http::priv::form_add_file(const char *name, const fs::path &path, const char* filename)
{
// We can't use CURLFORM_FILECONTENT, because curl doesn't support Unicode filenames on Windows
// and so we use CURLFORM_STREAM with boost ifstream to read the file.
if (filename == nullptr) {
filename = path.string().c_str();
}
form_files.emplace_back(path, std::ios::in | std::ios::binary);
auto &stream = form_files.back();
stream.seekg(0, std::ios::end);
size_t size = stream.tellg();
stream.seekg(0);
if (filename != nullptr) {
::curl_formadd(&form, &form_end,
CURLFORM_COPYNAME, name,
CURLFORM_FILENAME, filename,
CURLFORM_CONTENTTYPE, "application/octet-stream",
CURLFORM_STREAM, static_cast<void*>(&stream),
CURLFORM_CONTENTSLENGTH, static_cast<long>(size),
CURLFORM_END
);
}
}
void Http::priv::set_post_body(const fs::path &path)
{
std::ifstream file(path.string());
std::string file_content { std::istreambuf_iterator<char>(file), std::istreambuf_iterator<char>() };
postfields = file_content;
}
std::string Http::priv::curl_error(CURLcode curlcode)
{
return (boost::format("%1% (%2%)")
% ::curl_easy_strerror(curlcode)
% curlcode
).str();
}
std::string Http::priv::body_size_error()
{
return (boost::format("HTTP body data size exceeded limit (%1% bytes)") % limit).str();
}
void Http::priv::http_perform()
{
::curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
::curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writecb);
::curl_easy_setopt(curl, CURLOPT_WRITEDATA, static_cast<void*>(this));
::curl_easy_setopt(curl, CURLOPT_READFUNCTION, form_file_read_cb);
::curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);
#if LIBCURL_VERSION_MAJOR >= 7 && LIBCURL_VERSION_MINOR >= 32
::curl_easy_setopt(curl, CURLOPT_XFERINFOFUNCTION, xfercb);
::curl_easy_setopt(curl, CURLOPT_XFERINFODATA, static_cast<void*>(this));
(void)xfercb_legacy; // prevent unused function warning
#else
::curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, xfercb);
::curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, static_cast<void*>(this));
#endif
#ifndef NDEBUG
::curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
#endif
if (headerlist != nullptr) {
::curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headerlist);
}
if (form != nullptr) {
::curl_easy_setopt(curl, CURLOPT_HTTPPOST, form);
}
if (!postfields.empty()) {
::curl_easy_setopt(curl, CURLOPT_POSTFIELDS, postfields.c_str());
::curl_easy_setopt(curl, CURLOPT_POSTFIELDSIZE_LARGE, postfields.size());
}
CURLcode res = ::curl_easy_perform(curl);
if (res != CURLE_OK) {
if (res == CURLE_ABORTED_BY_CALLBACK) {
if (cancel) {
// The abort comes from the request being cancelled programatically
Progress dummyprogress(0, 0, 0, 0);
bool cancel = true;
if (progressfn) { progressfn(dummyprogress, cancel); }
} else {
// The abort comes from the CURLOPT_READFUNCTION callback, which means reading file failed
if (errorfn) { errorfn(std::move(buffer), "Error reading file for file upload", 0); }
}
}
else if (res == CURLE_WRITE_ERROR) {
if (errorfn) { errorfn(std::move(buffer), body_size_error(), 0); }
} else {
if (errorfn) { errorfn(std::move(buffer), curl_error(res), 0); }
};
} else {
long http_status = 0;
::curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &http_status);
if (http_status >= 400) {
if (errorfn) { errorfn(std::move(buffer), std::string(), http_status); }
} else {
if (completefn) { completefn(std::move(buffer), http_status); }
}
}
}
Http::Http(const std::string &url) : p(new priv(url)) {}
// Public
Http::Http(Http &&other) : p(std::move(other.p)) {}
Http::~Http()
{
if (p && p->io_thread.joinable()) {
p->io_thread.detach();
}
}
Http& Http::size_limit(size_t sizeLimit)
{
if (p) { p->limit = sizeLimit; }
return *this;
}
Http& Http::header(std::string name, const std::string &value)
{
if (!p) { return * this; }
if (name.size() > 0) {
name.append(": ").append(value);
} else {
name.push_back(':');
}
p->headerlist = curl_slist_append(p->headerlist, name.c_str());
return *this;
}
Http& Http::remove_header(std::string name)
{
if (p) {
name.push_back(':');
p->headerlist = curl_slist_append(p->headerlist, name.c_str());
}
return *this;
}
Http& Http::ca_file(const std::string &name)
{
if (p && priv::ca_file_supported(p->curl)) {
::curl_easy_setopt(p->curl, CURLOPT_CAINFO, name.c_str());
}
return *this;
}
Http& Http::form_add(const std::string &name, const std::string &contents)
{
if (p) {
::curl_formadd(&p->form, &p->form_end,
CURLFORM_COPYNAME, name.c_str(),
CURLFORM_COPYCONTENTS, contents.c_str(),
CURLFORM_END
);
}
return *this;
}
Http& Http::form_add_file(const std::string &name, const fs::path &path)
{
if (p) { p->form_add_file(name.c_str(), path.c_str(), nullptr); }
return *this;
}
Http& Http::form_add_file(const std::string &name, const fs::path &path, const std::string &filename)
{
if (p) { p->form_add_file(name.c_str(), path.c_str(), filename.c_str()); }
return *this;
}
Http& Http::set_post_body(const fs::path &path)
{
if (p) { p->set_post_body(path);}
return *this;
}
Http& Http::on_complete(CompleteFn fn)
{
if (p) { p->completefn = std::move(fn); }
return *this;
}
Http& Http::on_error(ErrorFn fn)
{
if (p) { p->errorfn = std::move(fn); }
return *this;
}
Http& Http::on_progress(ProgressFn fn)
{
if (p) { p->progressfn = std::move(fn); }
return *this;
}
Http::Ptr Http::perform()
{
auto self = std::make_shared<Http>(std::move(*this));
if (self->p) {
auto io_thread = std::thread([self](){
self->p->http_perform();
});
self->p->io_thread = std::move(io_thread);
}
return self;
}
void Http::perform_sync()
{
if (p) { p->http_perform(); }
}
void Http::cancel()
{
if (p) { p->cancel = true; }
}
Http Http::get(std::string url)
{
return std::move(Http{std::move(url)});
}
Http Http::post(std::string url)
{
Http http{std::move(url)};
curl_easy_setopt(http.p->curl, CURLOPT_POST, 1L);
return http;
}
bool Http::ca_file_supported()
{
::CURL *curl = ::curl_easy_init();
bool res = priv::ca_file_supported(curl);
if (curl != nullptr) { ::curl_easy_cleanup(curl); }
return res;
}
std::ostream& operator<<(std::ostream &os, const Http::Progress &progress)
{
os << "Http::Progress("
<< "dltotal = " << progress.dltotal
<< ", dlnow = " << progress.dlnow
<< ", ultotal = " << progress.ultotal
<< ", ulnow = " << progress.ulnow
<< ")";
return os;
}
}
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