Response headers can contain valuable information and may help to keep your API responses simpler by separating the actual response data from accessory metadata. |
For instance, when querying the API for a list of posts, the response body includes just the content but there are also some other valualbe information sent as headers: |
The PHP code for the CURL request would look something like this: |
$agent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36 X-Client-Data: CIa2yQEIpLbJAQjBtskBCKmdygEIqKPKARiSo8oB"; $curl = curl_init(); curl_setopt($curl, CURLOPT_URL, $url); curl_setopt($curl, CURLOPT_FILETIME, true); curl_setopt($curl, CURLOPT_NOBODY, true); curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); curl_setopt($curl, CURLOPT_HEADER, true); curl_setopt($curl, CURLOPT_USERAGENT, $agent); $header = curl_exec($curl); $info = curl_getinfo($curl); curl_close($curl); |
Which will output as below: |
HTTP/1.1 200 OK Date: Fri, 22 Jun 2018 06:47:27 GMT Server: Apache/2.4.33 (Win32) OpenSSL/1.0.2n PHP/5.6.35 Last-Modified: Sun, 11 Feb 2018 16:39:41 GMT ETag: "5ae6f-564f2687e28f8" Accept-Ranges: bytes Content-Length: 372335 Content-Type: application/pdf Array ( [url] => http://localhost/text-finder/download.pdf [content_type] => application/pdf [http_code] => 200 [header_size] => 265 [request_size] => 258 [filetime] => 1518367181 [ssl_verify_result] => 0 [redirect_count] => 0 [total_time] => 0.016 [namelookup_time] => 0.016 [connect_time] => 0.016 [pretransfer_time] => 0.016 [size_upload] => 0 [size_download] => 0 [speed_download] => 0 [speed_upload] => 0 [download_content_length] => 372335 [upload_content_length] => -1 [starttransfer_time] => 0.016 [redirect_time] => 0 [redirect_url] => [primary_ip] => ::1 [certinfo] => Array ( ) [primary_port] => 80 [local_ip] => ::1 [local_port] => 51877 ) HTTP/1.1 200 OK Date: Fri, 22 Jun 2018 06:48:11 GMT Server: Apache/2.4.33 (Win32) OpenSSL/1.0.2n PHP/5.6.35 Last-Modified: Fri, 22 Jun 2018 04:18:28 GMT ETag: "92-56f3352eebe85" Accept-Ranges: bytes Content-Length: 146 Content-Type: text/html Array ( [url] => http://localhost/text-finder/test2.html [content_type] => text/html [http_code] => 200 [header_size] => 253 [request_size] => 256 [filetime] => 1529641108 [ssl_verify_result] => 0 [redirect_count] => 0 [total_time] => 0.015 [namelookup_time] => 1.0E-6 [connect_time] => 0.015 [pretransfer_time] => 0.015 [size_upload] => 0 [size_download] => 0 [speed_download] => 0 [speed_upload] => 0 [download_content_length] => 146 [upload_content_length] => -1 [starttransfer_time] => 0.015 [redirect_time] => 0 [redirect_url] => [primary_ip] => ::1 [certinfo] => Array ( ) [primary_port] => 80 [local_ip] => ::1 [local_port] => 51944 ) |
Friday, June 22, 2018
Header only retrieval in php via curl | PHP CURL get content type from URL | PHP CURL retrieve headers information from URL
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