size_t
Net::Request::Read(void *_buffer, size_t buffer_size, unsigned long timeout)
{
assert(handle != NULL);
const int timeout_ms = timeout == INFINITE ? -1 : timeout;
Buffer::Range range;
CURLMcode mcode = CURLM_CALL_MULTI_PERFORM;
while (true) {
range = buffer.Read();
if (!range.IsEmpty())
break;
CURLcode code = session.InfoRead(handle);
if (code != CURLE_AGAIN)
return 0;
if (mcode != CURLM_CALL_MULTI_PERFORM &&
!session.Select(timeout_ms))
return 0;
CURLMcode mcode = session.Perform();
if (mcode != CURLM_OK && mcode != CURLM_CALL_MULTI_PERFORM)
return 0;
}
--buffer_size;
if (buffer_size > range.length)
buffer_size = range.length;
uint8_t *p = (uint8_t *)_buffer;
std::copy(range.data, range.data + buffer_size, p);
p[buffer_size] = 0;
buffer.Consume(buffer_size);
curl_easy_pause(handle, CURLPAUSE_CONT);
return buffer_size;
}
size_t
Net::Request::Read(void *_buffer, size_t buffer_size, unsigned _timeout_ms)
{
const int timeout_ms = _timeout_ms == INFINITE ? -1 : _timeout_ms;
Buffer::Range range;
CURLMcode mcode = CURLM_CALL_MULTI_PERFORM;
while (true) {
range = buffer.Read();
if (!range.IsEmpty())
break;
CURLcode code = session.InfoRead(handle.GetHandle());
if (code != CURLE_AGAIN) {
if (code != CURLE_OK)
throw std::runtime_error(curl_easy_strerror(code));
return 0;
}
if (mcode != CURLM_CALL_MULTI_PERFORM)
session.Select(timeout_ms);
mcode = session.Perform();
if (mcode != CURLM_OK && mcode != CURLM_CALL_MULTI_PERFORM)
throw std::runtime_error(curl_multi_strerror(mcode));
}
--buffer_size;
if (buffer_size > range.size)
buffer_size = range.size;
uint8_t *p = (uint8_t *)_buffer;
std::copy_n(range.data, buffer_size, p);
p[buffer_size] = 0;
buffer.Consume(buffer_size);
handle.Unpause();
return buffer_size;
}