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replace direct uses of fetch with fetchWithType

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This commit is contained in:
MrOtherGuy 2020-06-02 17:32:02 +03:00
parent c7750ad9e8
commit b31373f6a7
1 changed files with 32 additions and 14 deletions
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42
html_resources/selector.js
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@ -16,6 +16,31 @@ function initDB(obj){
return true return true
} }
function fetchWithType(url){
return new Promise((resolve,reject)=>{
const ext = url.substring(url.lastIndexOf(".")+1);
let expected = (ext === "json") ? "application/json" : (ext === "css") ? "text/css" : null;
if(!expected){
reject("unsupported file extension");
}
fetch(url)
.then(response =>{
const contentType = response.headers.get('content-type');
if (!contentType || !contentType.includes(expected)) {
reject(`Oops, we got ${contentType} but expected ${expected}`);
}
if(ext === "json"){
response.json()
.then(r=>resolve(r))
}else{
response.text()
.then(r=>resolve(r))
}
},except => reject(except))
});
}
let previousCategory = new (function(){ let previousCategory = new (function(){
let current = null; let current = null;
this.set = function(t){ this.set = function(t){
@ -42,9 +67,9 @@ async function onCategoryClicked(categoryNode){
async function onTargetClicked(targetNode){ async function onTargetClicked(targetNode){
const codeBlock = document.querySelector("pre"); const codeBlock = document.querySelector("pre");
let file = await fetch(`chrome/${getText(targetNode)}`); fetchWithType(`chrome/${getText(targetNode)}`)
let t = await file.text(); .then(text => (codeBlock.textContent = text))
codeBlock.textContent = t; .catch(e => console.log(e))
} }
function onSomeClicked(e){ function onSomeClicked(e){
@ -124,15 +149,8 @@ function createCategories(){
document.onreadystatechange = (function () { document.onreadystatechange = (function () {
if (document.readyState === "complete") { if (document.readyState === "complete") {
fetch("html_resources/tagmap.json") fetchWithType("html_resources/tagmap.json")
.then(response => { .then(response=>(initDB(response)))
const contentType = response.headers.get('content-type');
if (!contentType || !contentType.includes('application/json')) {
throw new TypeError("Oops, we haven't got JSON!");
}
return response.json();
})
.then(json=>(initDB(json)))
.then(()=>createCategories()) .then(()=>createCategories())
.catch(e=>{console.log(e);document.getElementById("ui").textContent = "FAILURE, Database could not be loaded"}); .catch(e=>{console.log(e);document.getElementById("ui").textContent = "FAILURE, Database could not be loaded"});
} }