55 lines
2.3 KiB
JavaScript
55 lines
2.3 KiB
JavaScript
function imgLoad(image) {
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'use strict';
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// Create new promise with the Promise() constructor;
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// This has as its argument a function with two parameters, resolve and reject
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return new Promise(function (resolve, reject) {
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// Standard XHR to load an image
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var request = new XMLHttpRequest();
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var url = 'http://127.0.0.1:4444/data/sshd/'+image+'.svg'
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request.open('GET', url);
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request.responseType = 'blob';
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// When the request loads, check whether it was successful
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request.onload = function () {
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if (request.status === 200) {
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// If successful, resolve the promise by passing back the request response
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resolve(request.response);
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} else {
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// If it fails, reject the promise with a error message
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reject(new Error('Image didn\'t load successfully; error code:' + request.statusText));
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}
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};
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request.onerror = function () {
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// Also deal with the case when the entire request fails to begin with
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// This is probably a network error, so reject the promise with an appropriate message
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reject(new Error('There was a network error.'));
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};
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// Send the request
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request.send();
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});
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}
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function loadImage(date, type) {
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'use strict';
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console.log(date);
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console.log(type);
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// Get a reference to the body element, and create a new image object
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var holder = document.querySelector('#imageholder'),
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myImage = new Image();
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myImage.crossOrigin = ""; // or "anonymous"
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// Call the function with the URL we want to load, but then chain the
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// promise then() method on to the end of it. This contains two callbacks
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imgLoad(date+'/'+date+':'+type).then(function (response) {
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// The first runs when the promise resolves, with the request.reponse specified within the resolve() method.
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var imageURL = window.URL.createObjectURL(response);
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myImage.src = imageURL;
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holder.innerHTML = "";
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holder.appendChild(myImage);
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// The second runs when the promise is rejected, and logs the Error specified with the reject() method.
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}, function (Error) {
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console.log(Error);
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});
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} |