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56 ” pecl_http PECL Extension associative array of cookie name-value pairs for the ’cookie’ request option. If your cookie values are already encoded, set the ’encodecookies’ request option to false. • Also like cURL, pecl_http includes an option to use a file for storing cookie data. U nlike cURL, pecl_http always uses the same data source for both read and write operations. That is, it consolidates the CURLOPT_COOKIEFILE and CURLOPT_COOKIEJAR options into the ’cookiestore’ request option. • Because the procedural API lacks the persistent scope that is a defining characteristic of the object-oriented API, extracting cookie values for uses beyond storage and persistence is somewhat involved. http_parse_message is used to parse the headers and body from a string containing an HTTP response message into an object for easier access. http_parse_cookie is then applied to Set-Cookie header values to parse the cookie data from them. • In HttpRequest the enableCookies method explicitly sets CURLOPT_COOKIEFILE to an empty string so that cookie data is persisted in memory. setCookies accepts an associative array of cookie name-value pairs just like the ’cookie’ request option. addCookies does the same thing, but merges the array contents into any existing cookie data rather than deleting the latter as setCookies does. • Once the send method is called on $request, cookie data from the response is retrieved by calling the getResponseCookies method. HTTP A uthentication The ’httpauth’ request option is used to set credentials in the format ’username:password’. The type of HTTP authentication to use is specified via the ’httpauthtype’ request option using one of the pecl_http HTTP_AUTH_ * constants, which are similar to those intended for the same purpose in the cURL extension. Lastly, the ’unrestrictedauth’ request option can be set to true if authentication credentials should be included in requests resulting from redirections pointing to a different host from the current one.
pecl_http PECL Extension ” 57 R edir ection and R efer ers Intuitively, the ’redirect’ request option is used to set the maximum number of redirections to process before automatically terminating. N ot so intuitively, it defaults to 0, which means that processing of redirections is disabled and you must explicitly set this request option to a value greater than 0 to enable it. The ’referer’ request option can be used to set the value of the Referer request header. Alternatively, it can be set via the ’headers’ request option (more on that shortly) when using the procedural API or the setHeaders and addHeaders methods of the HttpRequest class when using the object-oriented API. Content Caching The ’lastmodified’ request option accepts a UNIX timestamp to be used as the value for the If-Modified-Since or If-Unmodified-Since request header. Likewise, the ’etag’ request option accepts a string to be used as the value for the If-Match or If-None-Match request header. U ser Agents The ’useragent’ request option can be used to set a custom user agent string for the request. B yte Ranges Like cURL, pecl_http includes request options for a single resume point and multiple byte ranges. The former is ’resume’ and accepts an integer for the starting point. The latter is ’range’ and is formatted as an array of enumerated arrays each containing a pair of integers representing a single byte range. What follo ws is an example of setting byte ranges within a request options array.
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