fetch | 易学教程

React Native - Fetch call cached

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问题 I am building an app in react native which makes fetch calls that rely on the most up to date information from the server. I have noticed that it seems to cache the response and if i run that fetch call again it returns the cached response rather than the new information from my server. My function is as follows: goToAll() { AsyncStorage.getItem('FBId') .then((value) => { api.loadCurrentUser(value) .then((res) => { api.loadContent(res['RegisteredUser']['id']) .then((res2) => { console.log

React Native - Fetch call cached

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Server-side rendering with Rendertron - Angular 5 without firebase

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问题 I am using rendertron as a solution for server side rendering, below is index.js file. How to execute index.js and where to execute. I have setup my own instance of redertron using docker on my server and my angular app build is within dist folder how to render complete html of my angular app using rendertron and where to execute index.js const express = require('express'); const fetch = require('node-fetch'); const url = require('url'); const app = express(''); const appUrl = 'http://xyzabc

Encoding conversion of a fetch response

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问题 Inside a React Native method I'm fetching a xml encoded in ISO-8859-1. As long as the fetching is completed I'm trying to convert it to UTF-8. Here the code: const iconv = require('iconv-lite'); fetch('http://www.band.uol.com.br/rss/colunista_64.xml', { headers: { "Content-type": "text/xml; charset=ISO-8859-1" } }) .then(res=>res.text()}) .then(text => { const decodedText = iconv.decode(Buffer.from(text, 'latin1'), 'latin1') , output = iconv.encode(decodedText, 'utf8') console.log(output

How to send cookies with node-fetch?

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问题 I've got nodejs application which handles user's requests and receives cookies which i want to proxy to internal API service. How to approach this by using node-fetch? Don't offer superagent please. 回答1: You should be able to pass along cookies by setting it in the header of your request: const opts = { headers: { cookie: 'accessToken=1234abc; userId=1234' } }; const result = await fetch(`/some/url`, opts); 回答2: Read & write cookies like a bot async function login() { return fetch('<some_url>

How to handle errors in fetch() responses with Redux Thunk?

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问题 I'm making API requests using isomorphic fetch, and using Redux to handle my app's state. I want to handle both internet connection loss errors, and API errors, by firing off Redux actions. I have the following (work-in-progress / bad) code, but can't figure out the correct way to fire the Redux actions (rather than just throw an error and stop everything) : export function createPost(data = {}) { return dispatch => { dispatch(requestCreatePost(data)) return fetch(API_URL + data.type, {

How to fetch 2 times in MYSQL PDO without FETCHALL

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问题 I have this sample query: $STH = $DBH->query("SELECT id FROM table"); I want to get the first row and then loop and display all rows. So I use the following to get the first row: $STH->setFetchMode(PDO::FETCH_ASSOC); $first_row = $STH->fetch(); $first_row = $first_row['id']; I use while loop to display all rows again: while ($list = $STH->fetch()) { $id = $list['id']; echo $id; } Now the while skips the first row and I want it to be displayed. Is there an equivalent to mysql_data_seek to

求助 hue下载csv文件时报错 ERROR The query result cannot be downloaded，Invalid query handle:

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hiveserver2 ERROR The query result cannot be downloaded. Traceback (most recent call last): File "/opt/cloudera/parcels/CDH-5.13.3-1.cdh5.13.3.p0.2/lib/hue/desktop/libs/notebook/src/notebook/connectors/hiveserver2.py", line 368, in download db.fetch(handle, start_over=True, rows=1) File "/opt/cloudera/parcels/CDH-5.13.3-1.cdh5.13.3.p0.2/lib/hue/apps/beeswax/src/beeswax/server/dbms.py", line 326, in fetch return self.client.fetch(query_handle, start_over, rows) File "/opt/cloudera/parcels/CDH-5.13.3-1.cdh5.13.3.p0.2/lib/hue/apps/beeswax/src/beeswax/server/hive_server2_lib.py", line 1195, in

使用fetch进行数据请求时报json错误

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使用fetch进行数据请求返回response对象，response.json报错。原因是response中含有特殊字符。 fetch(url).then(response => response.json()) .then(data => console.log(data)) .catch(e => console.log("Oops, error", e)) 取消response.json()调用，使用response.text()返回请求数据的字符串，对特殊字符进行转义替换处理后，再进行json对象化传入请求成功的回调函数中。transSpecialChar是对字符串处理的函数 interface Body { readonly body: ReadableStream<Uint8Array> | null; readonly bodyUsed: boolean; arrayBuffer(): Promise<ArrayBuffer>; blob(): Promise<Blob>; formData(): Promise<FormData>; json(): Promise<any>; text(): Promise<string>; } response.text().then((text) => { const json = JSON.parse(this

PDO::fetchAll vs. PDO::fetch in a loop

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问题 Just a quick question. Is there any performance difference between using PDO::fetchAll() and PDO::fetch() in a loop (for large result sets)? I'm fetching into objects of a user-defined class, if that makes any difference. My initial uneducated assumption was that fetchAll might be faster because PDO can perform multiple operations in one statement while mysql_query can only execute one. However I have little knowledge of PDO's inner workings and the documentation doesn't say anything about