int HttpPlugin::get_info(Task *task) {
Http http;
http.set_timeout(task->timeout);
http.set_log(&debug_log);
#ifdef HAVE_SSL
if (task->url.get_protocol() == HTTPS) {
http.set_use_ssl(true);
}
#endif
if (task->url.get_user() != NULL) {
http.auth(task->url.get_user(),
task->url.get_password() ? task->url.get_password() : "");
}
if (task->get_referer() != NULL) {
http.header("Referer", task->get_referer());
} else {
http.header("Referer", task->url.get_url());
}
if (task->fileSize > 0) {
// test the Range
http.set_range(1);
}
if (task->proxy.get_type() == HTTP_PROXY) {
if (task->proxy.get_host() == NULL) {
return -1;
}
if (http.connect(task->proxy.get_host(), task->proxy.get_port()) < 0) {
return -2;
}
http.set_host(task->url.get_host(), task->url.get_port());
if (task->proxy.get_user() != NULL) {
http.proxy_auth(task->proxy.get_user(),
task->proxy.get_password() ? task->proxy.get_password() : "");
}
if (http.get(task->url.get_url()) < 0) {
return -2;
}
} else {
if (http.connect(task->url.get_host(), task->url.get_port()) < 0) {
return -2;
}
if (http.get(task->url.get_encoded_path()) < 0) {
return -2;
}
}
if (http.parse_header() < 0) return -2;
switch (http.get_status_code()) {
case 200: // HTTP_STATUS_OK
case 206: // HTTP_STATUS_PARTIAL_CONTENTS
case 300: // HTTP_STATUS_MULTIPLE_CHOICES
case 304: // HTTP_STATUS_NOT_MODIFIED
break;
case 301: // HTTP_STATUS_MOVED_PERMANENTLY
case 302: // HTTP_STATUS_MOVED_TEMPORARILY
case 303: // HTTP_SEE_OTHER
case 307: // HTTP_STATUS_TEMPORARY_REDIRECT
{ // redirect
task->fileSize = -1; // if not, the new location's filesize is wrong
const char *location = http.get_header("Location");
if (location == NULL) {
// I do not know when this will happen, but no harm
location = http.get_header("Content-Location");
if (location == NULL) return -1;
}
if (strcmp(location, task->url.get_url()) == 0) break;
if (task->url.reset_url(location) < 0) return -2;
return S_REDIRECT;
}
case 305: // HTTP_USE_PROXY
{ // get the content through the proxy
task->fileSize = -1; // if not, the new location's filesize is wrong
return S_REDIRECT;
}
case 408: // HTTP_CLIENT_TIMEOUT
case 504: // HTTP_GATEWAY_TIMEOUT
case 503: // HTTP_UNAVAILABLE
case 502: // HTTP_BAD_GATEWAY
{ // these errors can retry later
return -2;
}
default:
return -1;
}
// if the page is an active page, we maybe can not get the filesize
if (task->fileSize < 0) {
task->fileSize = http.get_file_size();
if (task->fileSize > 1) {
// we need test whether the Range header is supported or not
return -2;
}
} else {
// IIS never return the Accept-Ranges header
// We need check the Content-Range header for the resuming
const char *ptr = http.get_header("Content-Range");
if (ptr) {
while (*ptr != '\0' && !ISDIGIT(*ptr)) ptr++;
if (*ptr++ == '1' && *ptr == '-') {
// get the filesize again for ensure the size
task->fileSize = 1 + http.get_file_size();
task->resumeSupported = true;
}
}
}
const char *filename;
filename = http.get_header("Content-Disposition");
if (filename) {
filename = strstr(filename, "filename=");
if (filename) {
filename += strlen("filename=");
if (task->get_local_file() == NULL) {
task->set_local_file(filename);
}
}
}
if (task->get_local_file() == NULL && task->url.get_file() == NULL) {
task->set_local_file("index.html");
}
return 0;
};
int HttpPlugin::download(Task& task, Block *block) {
block->state = STOP;
if (task.resumeSupported) {
if (block->downloaded >= block->size) {
block->state = EXIT;
return 0;
} else {
block->bufferFile.seek(block->startPoint + block->downloaded);
}
} else {
block->bufferFile.seek(0);
block->downloaded = 0;
}
Http http;
http.set_timeout(task.timeout);
http.set_log(&debug_log);
#ifdef HAVE_SSL
if (task.url.get_protocol() == HTTPS) {
http.set_use_ssl(true);
}
#endif
if (task.resumeSupported) {
// the end is not set for the schedule purpose
http.set_range(block->startPoint + block->downloaded);
}
if (task.url.get_user() != NULL) {
http.auth(task.url.get_user(),
task.url.get_password() ? task.url.get_password() : "");
}
if (task.get_referer() != NULL) {
http.header("Referer", task.get_referer());
} else {
http.header("Referer", task.url.get_url());
}
if (task.proxy.get_type() == HTTP_PROXY) {
if (http.connect(task.proxy.get_host(), task.proxy.get_port()) < 0) {
return -2;
}
http.set_host(task.url.get_host(), task.url.get_port());
if (task.proxy.get_user() != NULL) {
http.proxy_auth(task.proxy.get_user(),
task.proxy.get_password() ? task.proxy.get_password() : "");
}
if (http.get(task.url.get_url()) < 0) {
return -2;
}
} else {
if (http.connect(task.url.get_host(), task.url.get_port()) < 0) {
return -2;
}
if (http.get(task.url.get_encoded_path()) < 0) {
return -2;
}
}
if (http.parse_header() < 0) return -2;
// the service maybe unreachable temply
// some servers alway return 302, so nasty
if (http.get_status_code() >= 400) return -2;
_re_retr:
block->state = RETR;
if (block->bufferFile.retr_data_from(&http, &block->downloaded,
block->size - block->downloaded) < 0) {
block->state = STOP;
return -2;
}
if (task.resumeSupported && block->downloaded < block->size) {
block->state = STOP;
return -2;
}
block->state = WAIT;
usleep(500000);
if (block->state == WAKEUP) goto _re_retr;
block->state = EXIT;
return 0;
};
