// Downloads the file at $url, and stores it at $filename.
void filter_url_download_file (string url, string filename, string& error)
{
#ifdef CLIENT_PREPARED
filter_url_simple_http_request (url, error, {}, filename, false);
#else
CURL *curl = curl_easy_init ();
if (curl) {
curl_easy_setopt (curl, CURLOPT_URL, url.c_str());
FILE* file = fopen (filename.c_str(), "w");
curl_easy_setopt (curl, CURLOPT_WRITEDATA, file);
curl_easy_setopt (curl, CURLOPT_FOLLOWLOCATION, 1L);
// curl_easy_setopt (curl, CURLOPT_VERBOSE, 1L);
filter_url_curl_set_timeout (curl);
CURLcode res = curl_easy_perform (curl);
if (res == CURLE_OK) {
error.clear ();
long http_code = 0;
curl_easy_getinfo (curl, CURLINFO_RESPONSE_CODE, &http_code);
if (http_code != 200) {
error.append ("http code " + convert_to_string ((int)http_code));
}
} else {
error = curl_easy_strerror (res);
}
curl_easy_cleanup (curl);
fclose (file);
}
#endif
}
// Sends a http GET request to the $url.
// It returns the response from the server.
// It writes any error to $error.
string filter_url_http_get (string url, string& error)
{
string response;
#ifdef CLIENT_PREPARED
response = filter_url_simple_http_request (url, error, {}, "", false);
#else
CURL *curl = curl_easy_init ();
if (curl) {
curl_easy_setopt (curl, CURLOPT_URL, url.c_str());
curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, filter_url_curl_write_function);
curl_easy_setopt (curl, CURLOPT_WRITEDATA, &response);
curl_easy_setopt (curl, CURLOPT_FOLLOWLOCATION, 1L);
// curl_easy_setopt (curl, CURLOPT_VERBOSE, 1L);
// Because a Bibledit client should work even over very bad networks,
// pass some timeout options to curl so it properly deals with such networks.
filter_url_curl_set_timeout (curl);
CURLcode res = curl_easy_perform (curl);
if (res == CURLE_OK) {
error.clear ();
long http_code = 0;
curl_easy_getinfo (curl, CURLINFO_RESPONSE_CODE, &http_code);
if (http_code != 200) {
response.append ("http code " + convert_to_string ((int)http_code));
}
} else {
response.clear ();
error = curl_easy_strerror (res);
}
curl_easy_cleanup (curl);
}
#endif
return response;
}
string email_receive_message (string& error)
{
#ifdef CLIENT_PREPARED
error = "Not implemented with embedded http library";
return "";
#else
CURL *curl;
CURLcode res = CURLE_OK;
struct cstring s;
init_string (&s);
curl = curl_easy_init ();
curl_easy_setopt (curl, CURLOPT_USERNAME, Database_Config_General::getMailStorageUsername ().c_str());
curl_easy_setopt (curl, CURLOPT_PASSWORD, Database_Config_General::getMailStoragePassword ().c_str());
string message_url = url () + "/1";
curl_easy_setopt (curl, CURLOPT_URL, message_url.c_str());
curl_easy_setopt (curl, CURLOPT_USE_SSL, (long)CURLUSESSL_ALL);
curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 0);
curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 0);
curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, writefunc);
curl_easy_setopt (curl, CURLOPT_WRITEDATA, &s);
// Some servers need this validation.
curl_easy_setopt (curl, CURLOPT_USERAGENT, "libcurl-agent/1.0");
filter_url_curl_set_timeout (curl);
res = curl_easy_perform (curl);
string body;
if (res == CURLE_OK) {
body = (char *) s.ptr;
} else {
error = curl_easy_strerror (res);
}
// Set the DELE command.
curl_easy_setopt (curl, CURLOPT_CUSTOMREQUEST, "DELE");
// Do not perform a transfer as DELE returns no data.
curl_easy_setopt (curl, CURLOPT_NOBODY, 1L);
// Perform the custom request.
res = curl_easy_perform(curl);
if (s.ptr) free (s.ptr);
curl_easy_cleanup (curl);
return body;
#endif
}
// Returns how many emails are waiting in the mail storage host's POP3 email inbox.
int email_receive_count (string& error, bool verbose)
{
#ifdef CLIENT_PREPARED
error = "Not implemented with embedded http library";
if (verbose) {}
return 0;
#else
CURL *curl;
CURLcode res = CURLE_OK;
struct cstring s;
init_string (&s);
curl = curl_easy_init ();
curl_easy_setopt (curl, CURLOPT_USERNAME, Database_Config_General::getMailStorageUsername ().c_str());
curl_easy_setopt (curl, CURLOPT_PASSWORD, Database_Config_General::getMailStoragePassword ().c_str());
curl_easy_setopt (curl, CURLOPT_URL, url ().c_str());
curl_easy_setopt (curl, CURLOPT_USE_SSL, (long)CURLUSESSL_ALL);
curl_easy_setopt (curl, CURLOPT_SSL_VERIFYPEER, 0);
curl_easy_setopt (curl, CURLOPT_SSL_VERIFYHOST, 0);
curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, writefunc);
curl_easy_setopt (curl, CURLOPT_WRITEDATA, &s);
if (verbose) {
curl_easy_setopt (curl, CURLOPT_DEBUGFUNCTION, filter_url_curl_debug_callback);
curl_easy_setopt (curl, CURLOPT_VERBOSE, 1L);
}
// Some servers need this validation.
curl_easy_setopt (curl, CURLOPT_USERAGENT, "libcurl-agent/1.0");
filter_url_curl_set_timeout (curl);
res = curl_easy_perform (curl);
int mailcount = 0;
if (res == CURLE_OK) {
string response = (char *) s.ptr;
response = filter_string_trim (response);
mailcount = filter_string_explode (response, '\n').size();
} else {
error = curl_easy_strerror (res);
}
if (s.ptr) free (s.ptr);
curl_easy_cleanup (curl);
return mailcount;
#endif
}
// Sends a http POST request to $url.
// burst: Set connection timing for burst mode, where the response comes after a relatively long silence.
// It posts the $values.
// It returns the response from the server.
// It writes any error to $error.
string filter_url_http_post (string url, map <string, string> values, string& error, bool burst)
{
string response;
#ifdef CLIENT_PREPARED
if (burst) {}
response = filter_url_simple_http_request (url, error, values, "", false);
#else
// Get a curl handle.
CURL *curl = curl_easy_init ();
if (curl) {
// First set the URL that is about to receive the POST.
// This can be http or https.
curl_easy_setopt (curl, CURLOPT_URL, url.c_str());
// Generate the post data.
string postdata;
for (auto & element : values) {
if (!postdata.empty ()) postdata.append ("&");
postdata.append (element.first);
postdata.append ("=");
postdata.append (filter_url_urlencode (element.second));
}
// Specify the POST data to curl, e.g.: "name=foo&project=bar"
curl_easy_setopt (curl, CURLOPT_POSTFIELDS, postdata.c_str());
// Callback for the server response.
curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, filter_url_curl_write_function);
curl_easy_setopt (curl, CURLOPT_WRITEDATA, &response);
// Further options.
curl_easy_setopt (curl, CURLOPT_FOLLOWLOCATION, 1L);
// curl_easy_setopt (curl, CURLOPT_VERBOSE, 1L);
// Timeouts for very bad networks, see the GET routine above for an explanation.
filter_url_curl_set_timeout (curl, burst);
// Perform the request.
CURLcode res = curl_easy_perform (curl);
// Result check.
if (res == CURLE_OK) {
error.clear ();
long http_code = 0;
curl_easy_getinfo (curl, CURLINFO_RESPONSE_CODE, &http_code);
if (http_code != 200) {
error.append ("Server response " + filter_url_http_response_code_text (http_code));
}
} else {
error = curl_easy_strerror (res);
}
// Always cleanup.
curl_easy_cleanup (curl);
}
#endif
return response;
}
// Sends a http POST request to $url as from a <form> with enctype="multipart/form-data".
// It posts the $values.
// It uploads $filename.
// It returns the response from the server.
// It writes any error to $error.
string filter_url_http_upload (string url, map <string, string> values, string filename, string& error)
{
string response;
#ifdef CLIENT_PREPARED
url.clear ();
values.clear ();
filename.clear ();
error = "Not implemented in client configuration";
#else
// Coded while looking at http://curl.haxx.se/libcurl/c/postit2.html.
struct curl_httppost *formpost=NULL;
struct curl_httppost *lastptr=NULL;
// Fill in the text fields to submit.
for (auto & element : values) {
curl_formadd (&formpost, &lastptr,
CURLFORM_COPYNAME, element.first.c_str (),
CURLFORM_COPYCONTENTS, element.second.c_str(),
CURLFORM_END);
}
// Fill in the file upload field to submit.
curl_formadd(&formpost, &lastptr,
CURLFORM_COPYNAME, "uploadedZipFile",
CURLFORM_FILE, filename.c_str(),
CURLFORM_END);
// Get a curl handle.
CURL *curl = curl_easy_init ();
if (curl) {
// First set the URL that is about to receive the POST.
curl_easy_setopt (curl, CURLOPT_URL, url.c_str());
// Specify the POST data to curl.
curl_easy_setopt (curl, CURLOPT_HTTPPOST, formpost);
// Callback for the server response.
curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, filter_url_curl_write_function);
curl_easy_setopt (curl, CURLOPT_WRITEDATA, &response);
// Further options.
curl_easy_setopt (curl, CURLOPT_FOLLOWLOCATION, 1L);
// curl_easy_setopt (curl, CURLOPT_VERBOSE, 1L);
// Timeouts for very bad networks, see the GET routine above for an explanation.
filter_url_curl_set_timeout (curl, false);
// Perform the request.
CURLcode res = curl_easy_perform (curl);
// Result check.
if (res == CURLE_OK) {
error.clear ();
long http_code = 0;
curl_easy_getinfo (curl, CURLINFO_RESPONSE_CODE, &http_code);
if (http_code != 200) {
error.append ("Server response " + filter_url_http_response_code_text (http_code));
}
} else {
error = curl_easy_strerror (res);
}
// Always cleanup cURL.
curl_easy_cleanup (curl);
// Then cleanup the formpost chain.
curl_formfree (formpost);
}
#endif
return response;
}
