fetch-api

问题 I'm in the process of removing jQuery in one of my asp.net mvc projects in favor of using straight vanilla JS. Now that I've replaced $.ajax POST calls with Fetch API calls, each call triggers a new session on the server. This has been driving me up the wall for the past few days, and I've narrowed it down to specifically this switch from using jQuery Ajax to Fetch API. My new Fetch API calls work perfectly otherwise, still performing the needed server-side work. The just trigger a new server

问题 I'm working on my application now. I'm trying to use fetch for login page, but I don't really understand how to use fetch even reading some example of code. Could anyone please help me get that? For instance, I have to use these information to login to my server. username: "user" password: "1234" then I want server return that login success or not and return a token if loging in is success I tried to used this code render() { return ( fetch('mysite', { method: 'POST', body: JSON.stringify({

问题 I'm working on my application now. I'm trying to use fetch for login page, but I don't really understand how to use fetch even reading some example of code. Could anyone please help me get that? For instance, I have to use these information to login to my server. username: "user" password: "1234" then I want server return that login success or not and return a token if loging in is success I tried to used this code render() { return ( fetch('mysite', { method: 'POST', body: JSON.stringify({

问题 I'm working on my application now. I'm trying to use fetch for login page, but I don't really understand how to use fetch even reading some example of code. Could anyone please help me get that? For instance, I have to use these information to login to my server. username: "user" password: "1234" then I want server return that login success or not and return a token if loging in is success I tried to used this code render() { return ( fetch('mysite', { method: 'POST', body: JSON.stringify({

问题 I know this question is answered, but I am facing issue while downloading image using Fetch API. Code that I am using to get image. function downloadImage() { fetch('https://upload.wikimedia.org/wikipedia/commons/9/98/Pet_dog_fetching_sticks_in_Wales-3April2010.jpg', {mode: 'no-cors'}) .then(response => response.blob()) .then(blob => { console.log(blob); }); } Here, when I do console.log I get response Blob {size: 0, type: ""} . Please let me know what I am doing wrong here? 回答1: By default

问题 I know this question is answered, but I am facing issue while downloading image using Fetch API. Code that I am using to get image. function downloadImage() { fetch('https://upload.wikimedia.org/wikipedia/commons/9/98/Pet_dog_fetching_sticks_in_Wales-3April2010.jpg', {mode: 'no-cors'}) .then(response => response.blob()) .then(blob => { console.log(blob); }); } Here, when I do console.log I get response Blob {size: 0, type: ""} . Please let me know what I am doing wrong here? 回答1: By default

问题 I am using fetch() to grab data from api server. My error looks like this: Uncaught (in promise) SyntaxError: Unexpected end of input at fetch.then.blob. Can you please tell me what am I doing wrong. const weatherAPi ='https://www.metaweather.com/api/location/523920'; fetch(weatherAPi, { mode: 'no-cors' }).then(blob => blob.json()) .then(data => console.log(data)) 回答1: A response for no-cors request to cross-origin resource has a response type of 'opaque'. If you log the response before

问题 I am using fetch() to grab data from api server. My error looks like this: Uncaught (in promise) SyntaxError: Unexpected end of input at fetch.then.blob. Can you please tell me what am I doing wrong. const weatherAPi ='https://www.metaweather.com/api/location/523920'; fetch(weatherAPi, { mode: 'no-cors' }).then(blob => blob.json()) .then(data => console.log(data)) 回答1: A response for no-cors request to cross-origin resource has a response type of 'opaque'. If you log the response before

问题 I am trying to populate an image with a URl <Image source={{uri: this.state.imageURL}} style={styles.thumb} /> I request the image from the server, using the fetch API, and it returns a blob. I then convert the BLOB into a URL using the following line: var imageURL = window.URL.createObjectURL(attachmentBLOB); When I console.log() the imageURL it prints: blob:http%3A//localhost%3A8081/4ce24d92-0b7e-4350-9a18-83b74bed6f87 I am getting no errors or warning. The image is just not displaying I am

问题 I want to intercept the fetch API request and response in Javascript. For ex: Before sending the request want to intercept the request URL and once get the response wants to intercept the response. The below code is for intercepting response of All XMLHTTPRequest. (function(open) { XMLHttpRequest.prototype.open = function(XMLHttpRequest) { var self = this; this.addEventListener("readystatechange", function() { if (this.responseText.length > 0 && this.readyState == 4 && this.responseURL