fetch

问题 I have data like this: { "movies": [ { "abridged_cast": [ { "characters": [ "Dominic Toretto" ], "id": "162652472", "name": "Vin Diesel" }, { "characters": [ "Brian O'Conner" ], "id": "162654234", "name": "Paul Walker" }, { "characters": [ "Louie Tran" ], "id": "162684066", "name": "Tony Jaa" }, { "characters": [ "Deckard Shaw" ], "id": "162653720", "name": "Jason Statham" }, { "characters": [ "Luke Hobbs" ], "id": "770893686", "name": "Dwayne \"The Rock\" Johnson" } ], "alternate_ids": {

问题 I'm looking for solutions for better data fetching in a Next.js app. In this question I'm not just looking for a solution, I'm looking for multiple options so we can look at the pros and cons. The problem I have Right now I have a few pages that all include a component that displays som static content and a that have some dynamic content that is fetched from an API. Each page do a fetch() in their getInitialProps() to get their own page data, but also the footer data, which is the same for

问题 I'm looking for solutions for better data fetching in a Next.js app. In this question I'm not just looking for a solution, I'm looking for multiple options so we can look at the pros and cons. The problem I have Right now I have a few pages that all include a component that displays som static content and a that have some dynamic content that is fetched from an API. Each page do a fetch() in their getInitialProps() to get their own page data, but also the footer data, which is the same for

问题 I'm trying to get JSON saved into a variable, but it seems I don't understand everything here. I get JSON show up in console a once the way I like, but after I try to call it again later it only returns promise. How can I get JSON saved into a variable, so I could use objects in JSON later? var jsondata = fetch(url).then( function(u){ return u.json();} ).then( function(json){ console.log(json); } ) console.log(jsondata); 回答1: let jsondata; fetch(url).then( function(u){ return u.json();} )

问题 I'm trying to get JSON saved into a variable, but it seems I don't understand everything here. I get JSON show up in console a once the way I like, but after I try to call it again later it only returns promise. How can I get JSON saved into a variable, so I could use objects in JSON later? var jsondata = fetch(url).then( function(u){ return u.json();} ).then( function(json){ console.log(json); } ) console.log(jsondata); 回答1: let jsondata; fetch(url).then( function(u){ return u.json();} )

问题 My code: const file = { uri: this.state.imageSource, name: this.state.imageName, type: 'image/jpg', }; const data = new FormData(); data.append('file', file); fetch(config.server + '/upload', { method: 'POST', body: data, }) .then((res) => res.json()) .then((responseData) => { alert(JSON.stringify(responseData)); }) .catch((err) => { alert(err); }); Without FormData code doesnt display error. What I should do to fix? Debugging on android. 回答1: The error was because I was passing in the url as

问题 I have a flask server running that provides me with a JSON message when I manually visit 127.0.0.1:5000/data/get_data . CORS is disabled in this flask server and in my fetch-request I added {mode: 'no-cors'} as well. Whenever I use the fetch-request in javascript, the response is empty while Flask tells me the GET request was heard and a response was sent. Flask gives me the exact same output when I manually request the data (and I can view the received JSON in the browser). This is the

问题 Is there a way to check if a resource is cached by the browser without downloading the resource? Most of the questions and answers are old and I believe things have changed now and there are better ways. 回答1: You can leverage the fetch API and it's correspondent AbortController to achieve this functionality with a margin of error (expected false negatives). It goes like this, fetch the required resource with a signal attached. Abort in a small amount of time eg. 4ms. If the fetch is returned

问题 Hello this is a question to help me understand how Promises .then returns work. The question is: how can I scoped variables to the second .then chained function? Here is a jsbin http://jsbin.com/xacuna/edit?js,output I can access the global variables, and pass in the scoped variables to the first then, but not after. let innerReturnFunction = (res, myName) => { /* this works */ console.log(`hi from inner name: ${myName}`) return res } let getInnerFuncVariable = () => { var myName = 'arturo'

问题 My project is based on React, redux, redux-saga, es6 and I try to fetch data from this API: http://api.dhsprogram.com/rest/dhs/data/BD,2000,2004,2007?&returnFields=CharacteristicLabel,Indicator,IndicatorId,Value&f=json As you can see, this specific API call shows data with a limit of 100 data per page spread on 40 pages. According to this answer: http://userforum.dhsprogram.com/index.php?t=msg&th=2086&goto=9591&S=Google it says that you can extend the limit to a maximum of 3000data per page.