59 lines
2 KiB
JavaScript
59 lines
2 KiB
JavaScript
const Uiharu = function(apiUrl) {
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const maxBatchSize = 4;
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const lookupOneUrl = apiUrl + '/metadata',
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lookupManyUrl = apiUrl + '/metadata/batch';
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const lookupManyInternal = function(targetUrls, callback) {
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const formData = new FormData;
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for(const url of targetUrls)
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formData.append('url[]', url);
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const xhr = new XMLHttpRequest;
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xhr.addEventListener('load', function() {
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callback(JSON.parse(xhr.responseText));
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});
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xhr.addEventListener('error', function(ev) {
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callback({ status: xhr.status, error: 'xhr', details: ev });
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});
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xhr.open('POST', lookupManyUrl);
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xhr.send(formData);
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};
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return {
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lookupOne: function(targetUrl, callback) {
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if(typeof callback !== 'function')
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throw 'callback is missing';
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targetUrl = (targetUrl || '').toString();
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if(targetUrl.length < 1)
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return;
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const xhr = new XMLHttpRequest;
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xhr.addEventListener('load', function() {
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callback(JSON.parse(xhr.responseText));
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});
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xhr.addEventListener('error', function() {
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callback({ status: xhr.status, error: 'xhr', details: ex });
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});
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xhr.open('POST', lookupOneUrl);
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xhr.send(targetUrl);
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},
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lookupMany: function(targetUrls, callback) {
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if(!Array.isArray(targetUrls))
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throw 'targetUrls must be an array of urls';
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if(typeof callback !== 'function')
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throw 'callback is missing';
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if(targetUrls < 1)
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return;
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if(targetUrls.length <= maxBatchSize) {
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lookupManyInternal(targetUrls, callback);
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return;
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}
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for(let i = 0; i < targetUrls.length; i += maxBatchSize)
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lookupManyInternal(targetUrls.slice(i, i + maxBatchSize), callback);
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},
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};
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};
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