Skip to content

Add Robust SSE Buffering for OpenAI Stream Responses #55

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
moulai wants to merge 1 commit into
base: main
Choose a base branch
from
Open

Add Robust SSE Buffering for OpenAI Stream Responses #55

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
79 changes: 66 additions & 13 deletions helper.php
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -60,26 +60,79 @@ function streamOpenAiApi(object $config, string $prompt, string $content, callab
],
];

$curl_info[CURLOPT_WRITEFUNCTION] = function ($curl_info, $data) use ($task_callback, $finish_callback) {
$stream_buffer = '';
$error_buffer = '';
$http_error_handled = false;

$curl_info[CURLOPT_WRITEFUNCTION] = function ($curl_handle, $data) use (&$stream_buffer, &$error_buffer, &$http_error_handled, $task_callback, $finish_callback) {
Minz_Log::debug('Receive msg:' . $data);

// if http status code != 200, then call the finish_callback to send the error message and stop the stream
if (curl_getinfo($curl_info, CURLINFO_HTTP_CODE) != 200) {
$task_callback(_errorHtmlSuffix(json_decode($data)->error->message));
$finish_callback();
$status = curl_getinfo($curl_handle, CURLINFO_HTTP_CODE);

// Handle non-200 HTTP responses by buffering until we can decode the error payload.
if ($status && $status != 200) {
if (!$http_error_handled) {
$error_buffer .= $data;
$decoded_error = json_decode($error_buffer);
if ($decoded_error !== null) {
$message = isset($decoded_error->error->message) ? $decoded_error->error->message : _t('gen.error.unknown');
$task_callback(_errorHtmlSuffix($message));
$finish_callback();
$http_error_handled = true;
}
}

return strlen($data);
}

$msg_list = explode(PHP_EOL, trim($data));
foreach ($msg_list as $msg) {
$msg = trim(substr(trim($msg), 5));
$stream_buffer .= $data;
$stream_buffer = str_replace("\r\n", "\n", $stream_buffer);

if ($msg == '') {
continue;
} else if ($msg == "[DONE]") {
while (($event_separator_pos = strpos($stream_buffer, "\n\n")) !== false) {
$raw_event = substr($stream_buffer, 0, $event_separator_pos);
$stream_buffer = substr($stream_buffer, $event_separator_pos + 2);

$lines = preg_split('/\r?\n/', $raw_event);
$event_name = '';
$data_lines = [];

foreach ($lines as $line) {
$line = trim($line);
if ($line === '') {
continue;
}

if (stripos($line, 'event:') === 0) {
$event_name = trim(substr($line, strlen('event:')));
continue;
}

if (stripos($line, 'data:') === 0) {
$data_lines[] = ltrim(substr($line, strlen('data:')));
}
}

$event_data = implode("\n", $data_lines);

if ($event_name === 'done' || $event_data === '[DONE]') {
$finish_callback();
} else {
$task_callback(_dealResponse(json_decode($msg)));
continue;
}

if ($event_data === '') {
continue;
}

$decoded_payload = json_decode($event_data);
if ($decoded_payload === null) {
// Wait for more data if JSON is incomplete.
$stream_buffer = $raw_event . "\n\n" . $stream_buffer;
break;
}

$delta = _dealResponse($decoded_payload);
if ($delta !== '') {
$task_callback($delta);
}
}

Expand Down