Parse Link Header

parse_link_header.md

Parse Link Header

• http://tools.ietf.org/html/rfc5988
• https://developer.github.com/v3/#pagination
• https://gist.github.com/niallo/3109252

JavaScript

function parse_link_header(header) {
    if (header.length === 0) {
        throw new Error("input must not be of zero length");
    }

    // Split parts by comma
    var parts = header.split(',');
    var links = {};
    // Parse each part into a named link
    for(var i=0; i<parts.length; i++) {
        var section = parts[i].split(';');
        if (section.length !== 2) {
            throw new Error("section could not be split on ';'");
        }
        var url = section[0].replace(/<(.*)>/, '$1').trim();
        var name = section[1].replace(/rel="(.*)"/, '$1').trim();
        links[name] = url;
    }
    return links;
}

PHP

function parseLinkHeader($header) {
    if (strlen($header) == 0) {
        throw new \Exception("input must not be of zero length");
    }

    $parts = explode(',', $header);
    $links = [];

    foreach($parts as $p) {
        $section = explode(';', $p);
        if (count($section) != 2) {
            throw new \Exception("section could not be split on ';'");
        }
        $url = trim(preg_replace("/<(.*)>/", '$1', $section[0]));
        $name = trim(preg_replace("/rel=\"(.*)\"/", '$1', $section[1]));
        $links[$name] = $url;
    }
    return $links;
}