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

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
)

No comments:

Post a Comment