Handling Large File Downloads with Curl: Streaming to Disk
Downloading large files using curl can be challenging due to memory constraints. The traditional method, which reads the entire file into memory before writing it to disk, can cause performance issues. To overcome this limitation, consider streaming the file directly to disk.
Here's a solution that employs the curl_setopt() function to configure the CURLOPT_FILE option. This option specifies a file pointer where curl can directly write the downloaded data:
set_time_limit(0); // Disable PHP time limit // Open a file for writing $fp = fopen(dirname(__FILE__) . '/localfile.tmp', 'w+'); // Initialize curl $ch = curl_init(str_replace(" ", "%20", $url)); // Set timeout to a high value curl_setopt($ch, CURLOPT_TIMEOUT, 600); // Write curl response to file curl_setopt($ch, CURLOPT_FILE, $fp); // Follow any redirects curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true); // Execute curl curl_exec($ch); // Close curl and file handlers curl_close($ch); fclose($fp);
In this improved code:
By using this technique, curl can stream the downloaded data directly to disk, bypassing the memory constraints and enabling efficient handling of large files.
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