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added css_query operation
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parent
d5f84abb3b
commit
2db6f8f63c
3 changed files with 77 additions and 4 deletions
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@ -314,8 +314,8 @@ var Extract = {
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* @returns {string}
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*/
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run_xpath:function(input, args) {
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var query = args[0];
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var delimiter = args[1];
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const query = args[0];
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const delimiter = args[1];
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try {
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var xml = $.parseXML(input);
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@ -329,7 +329,7 @@ var Extract = {
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return "Invalid XPath. Details:\n" + err.message;
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}
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var serializer = new XMLSerializer();
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const serializer = new XMLSerializer();
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const nodeToString = function(node) {
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const { nodeType, value, wholeText, data } = node;
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switch (nodeType) {
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@ -344,5 +344,59 @@ var Extract = {
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return Object.values(result).slice(0, -1) // all values except last (length)
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.map(nodeToString)
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.join(delimiter);
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}
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},
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/**
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* @constant
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* @default
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*/
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SELECTOR_INITIAL: "",
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/**
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* @constant
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* @default
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*/
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CSS_QUERY_DELIMITER: "\\n",
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/**
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* Extract information (from an hmtl document) with an css selector
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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run_css_query: function(input, args) {
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const query = args[0];
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const delimiter = args[1];
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try {
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var html = $.parseHTML(input);
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} catch (err) {
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return "Invalid input HTML.";
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}
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try {
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var result = $(html).find(query);
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} catch (err) {
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return "Invalid CSS Selector. Details:\n" + err.message;
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}
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const nodeToString = function(node) {
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const { nodeType, value, wholeText, data } = node;
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switch (nodeType) {
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case Node.ELEMENT_NODE: return node.outerHTML;
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case Node.ATTRIBUTE_NODE: return value;
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case Node.COMMENT_NODE: return data;
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case Node.TEXT_NODE: return wholeText;
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case Node.DOCUMENT_NODE: return node.outerHTML;
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default: throw new Error(`Unknown Node Type: ${nodeType}`);
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}
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}
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return Array.apply(null, Array(result.length))
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.map(function (_, i) {return result[i];})
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.map(nodeToString)
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.join(delimiter);
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},
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};
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