|
| 1 | +(function () { |
| 2 | + angular |
| 3 | + .module("ig.linkHeaderParser", []) |
| 4 | + .factory("linkHeaderParser", linkHeaderParser); |
| 5 | + |
| 6 | + /* @ngInject */ |
| 7 | + function linkHeaderParser($log) { |
| 8 | + var service = { |
| 9 | + parse: parse |
| 10 | + }; |
| 11 | + |
| 12 | + return service; |
| 13 | + |
| 14 | + //////////////////////////////////////////////////// |
| 15 | + |
| 16 | + /** |
| 17 | + * |
| 18 | + * @param linkHeader |
| 19 | + * @returns {*} |
| 20 | + */ |
| 21 | + function parse(linkHeader) { |
| 22 | + var linkHeaderObject = {}; |
| 23 | + |
| 24 | + $log.debug("Link header: ", linkHeader); |
| 25 | + |
| 26 | + if ( typeof linkHeader !== "string" ) |
| 27 | + return new Error("Expected a string as parameter type but received: '" + typeof linkHeader + "'!"); |
| 28 | + if ( linkHeader.length == 0 ) |
| 29 | + return new Error("Empty string provided!"); |
| 30 | + |
| 31 | + var links = linkHeader.split(","); |
| 32 | + |
| 33 | + $log.debug("Links: ", links); |
| 34 | + |
| 35 | + _.forEach(links, function (link) { |
| 36 | + _parseElement(link, linkHeaderObject); |
| 37 | + }); |
| 38 | + |
| 39 | + $log.debug("Object returned: ", linkHeaderObject); |
| 40 | + |
| 41 | + return linkHeaderObject; |
| 42 | + } |
| 43 | + |
| 44 | + //////////////////////////////////////////////////// |
| 45 | + |
| 46 | + /** |
| 47 | + * |
| 48 | + * @param element |
| 49 | + * @param object |
| 50 | + * @private |
| 51 | + */ |
| 52 | + function _parseElement(element, object) { |
| 53 | + $log.debug("Element to parse: ", element); |
| 54 | + |
| 55 | + var items = element.split(";"); |
| 56 | + |
| 57 | + items[ 0 ] = items[ 0 ].trim(); |
| 58 | + items[ 1 ] = items[ 1 ].trim(); |
| 59 | + |
| 60 | + $log.debug("Element splitted and trimmed: ", items); |
| 61 | + |
| 62 | + object[ _parseRelElement(items[ 1 ]) ] = _parseURLElement(items[ 0 ]); |
| 63 | + } |
| 64 | + |
| 65 | + /** |
| 66 | + * |
| 67 | + * @param relElement |
| 68 | + * @returns {*} |
| 69 | + * @private |
| 70 | + */ |
| 71 | + function _parseRelElement(relElement) { |
| 72 | + $log.debug("REL element to parse: ", relElement); |
| 73 | + |
| 74 | + var items = relElement.split("="); |
| 75 | + |
| 76 | + items[ 1 ] = items[ 1 ].trim().toLowerCase(); |
| 77 | + items[ 1 ] = items[ 1 ].replace(/"/g, ""); |
| 78 | + |
| 79 | + $log.debug("Parsed REL element: ", items[ 1 ]); |
| 80 | + |
| 81 | + return items[ 1 ]; |
| 82 | + } |
| 83 | + |
| 84 | + /** |
| 85 | + * |
| 86 | + * @param urlElement |
| 87 | + * @returns {*|{}} |
| 88 | + * @private |
| 89 | + */ |
| 90 | + function _parseURLElement(urlElement) { |
| 91 | + $log.debug("URL element to parse: ", urlElement); |
| 92 | + |
| 93 | + urlElement = urlElement.replace(/^</, "").replace(/>$/, ""); |
| 94 | + |
| 95 | + var extracted = URIUtil.parse(urlElement); |
| 96 | + |
| 97 | + extracted.url = urlElement; |
| 98 | + |
| 99 | + $log.debug("Extracted data: ", extracted); |
| 100 | + |
| 101 | + return extracted; |
| 102 | + } |
| 103 | + } |
| 104 | + linkHeaderParser.$inject = ["$log"]; |
| 105 | +})(); |
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