59 lines
1.4 KiB
JavaScript
59 lines
1.4 KiB
JavaScript
function getJSON(url, method) {
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return new Promise(function(resolve, reject) {
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fetch(new Request(url, {
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method: method || "get",
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credentials: "same-origin",
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headers: {
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"Accept": "application/json",
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},
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})).then(function(response) {
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response.text().then(function(txt) {
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resolve(JSON.parse(txt))
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}).catch(reject)
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}).catch(reject)
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})
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}
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function pollTask(poll_url, disableTimeout) {
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return new Promise(function(resolve, reject) {
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var tries = 0;
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function retry() {
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tries++;
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if (!disableTimeout && tries > 10) {
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reject("timeout")
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} else {
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const interval = Math.min(tries*100, 1000)
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console.log("Polling task in " + interval + "ms")
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setTimeout(step, interval)
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}
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}
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function step() {
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getJSON(poll_url).then(function(res) {
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if (res.status == "SUCCESS") {
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console.log("Got result")
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resolve(res.result)
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} else if (res.status == "FAILURE" || res.status == "REVOKED") {
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reject()
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} else {
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retry()
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}
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}).catch(retry)
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}
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retry()
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})
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}
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function performTask(url) {
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return new Promise(function(resolve, reject) {
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getJSON(url, "post").then(function(startResult) {
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console.log(startResult)
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if (typeof startResult.poll_url == "string") {
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pollTask(startResult.poll_url).then(resolve).catch(reject)
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} else {
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reject("Start task didn't return string!")
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}
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}).catch(reject)
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})
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}
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