fetch

Axios and Fetch both result in CORS error but Postman doesn't

由 左心房为你撑大大i 提交于 2020-01-25 05:25:06
问题 If I make a ajax request using either Axios or Fetch to this public endpoint: http://api.flickr.com/services/feeds/photos_public.gne?format=json I get the following error: Access to fetch at 'http://api.flickr.com/services/feeds/photos_public.gne?format=json' from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the

Why does fetch return a weird hash of integers - part 2?

由 |▌冷眼眸甩不掉的悲伤 提交于 2020-01-25 04:30:25
问题 I'm using async/await with React Native. My result from response.json() is: { _45: 0, _81: 0, _65: null, _54: null } For whatever reason, the actual response I want is located in _65 and I have no idea what these random keys are. It seems that it is related to the fact that .json() returns a Promise. componentDidMount() { this.getData().then(data => this.setState({ data })) } async getData() { try { let response = await fetch(myUrl) let json = await response.json() return json } catch(err) {

kafka参数设置

由 Deadly 提交于 2020-01-25 00:52:41
############################# System ############################# #唯一标识在集群中的ID，要求是正数。 broker .id = 0 #服务端口，默认9092 port = 9092 #监听地址，不设为所有地址 host .name = debugo01 # 处理网络请求的最大线程数 num .network .threads = 2 # 处理磁盘I/O的线程数 num .io .threads = 8 # 一些后台线程数 background .threads = 4 # 等待IO线程处理的请求队列最大数 queued .max .requests = 500 # socket的发送缓冲区（SO_SNDBUF） socket .send .buffer .bytes = 1048576 # socket的接收缓冲区 (SO_RCVBUF) socket .receive .buffer .bytes = 1048576 # socket请求的最大字节数。为了防止内存溢出，message.max.bytes必然要小于 socket .request .max .bytes = 104857600 ############################# Topic #######################

Kafka 0.8 配置参数解析

由 拜拜、爱过 提交于 2020-01-25 00:52:02
http://kafka.apache.org/documentation.html#configuration Broker Configs 4个必填参数， broker.id Each broker is uniquely identified by a non-negative integer id broker唯一标识，broker可以在不同的host或port，但必须保证id唯一 log.dirs (/tmp/kafka-logs) 日志文件存放的目录 可以用逗号隔开多个目录，当创建partitions时，会自动挑一个已创建partition最少的目录创建 因为Kafka必须充分利用磁盘资源，所以要让partititons均匀分布在所有disks上，至少每个disk创建一个目录 port (6667) broker server所在端口 zookeeper.connect zk的地址，hostname1:port1,hostname2:port2 可选的重要参数， advertised.host.name (null) 设置暴露给其他Consumer，producer，broker的域名 不设置会暴露默认域名，域名解析比较麻烦，这里可以设为ip message.max.bytes (1000000) broker可以接收的message的最大size

Is angular really following the fetch's specifications?

由 扶醉桌前 提交于 2020-01-24 21:10:05
问题 The Angular's http docs says that the response returned by the http service follows the fetch specification. https://angular.io/guide/http#parse-to-json And in their example, this is the code you can find private extractData(res: Response) { let body = res.json(); return body.data || { }; } In which, obviously, the result of res.json() is not a promise . But in the fetch specification, the response.json() method is supposed to return a Promise . https://fetch.spec.whatwg.org/#response-class

Is angular really following the fetch's specifications?

由 让人想犯罪 __ 提交于 2020-01-24 21:08:13
问题 The Angular's http docs says that the response returned by the http service follows the fetch specification. https://angular.io/guide/http#parse-to-json And in their example, this is the code you can find private extractData(res: Response) { let body = res.json(); return body.data || { }; } In which, obviously, the result of res.json() is not a promise . But in the fetch specification, the response.json() method is supposed to return a Promise . https://fetch.spec.whatwg.org/#response-class

React Custom Hooks fetch data globally and share across components?

由 耗尽温柔 提交于 2020-01-24 19:37:26
问题 in this react example from https://reactjs.org/docs/hooks-custom.html, a custom hook is used in 2 different components to fetch online status of a user... function useFriendStatus(friendID) { const [isOnline, setIsOnline] = useState(null); useEffect(() => { function handleStatusChange(status) { setIsOnline(status.isOnline); } ChatAPI.subscribeToFriendStatus(friendID, handleStatusChange); return () => { ChatAPI.unsubscribeFromFriendStatus(friendID, handleStatusChange); }; }); return isOnline;

Kafka server.properties 详细配置总结

由 孤者浪人 提交于 2020-01-24 16:32:18
技术博客： https://github.com/yongxinz/tech-blog 同时，也欢迎关注我的微信公众号 AlwaysBeta ，更多精彩内容等你来。 如下为详细的 server.properties 参数配置，可根据真实业务场景来选择需要使用。 ############################# System ############################# #唯一标识在集群中的ID，要求是正数。 broker . id = 0 #服务端口，默认9092 port = 9092 #监听地址，不设为所有地址 host . name = debugo01 # 处理网络请求的最大线程数 num . network . threads = 2 # 处理磁盘I/O的线程数 num . io . threads = 8 # 一些后台线程数 background . threads = 4 # 等待IO线程处理的请求队列最大数 queued . max . requests = 500 # socket的发送缓冲区（SO_SNDBUF） socket . send . buffer . bytes = 1048576 # socket的接收缓冲区 (SO_RCVBUF) socket . receive . buffer . bytes = 1048576 #

Requesting blob images and transforming to base64 with fetch API

由 假装没事ソ 提交于 2020-01-24 06:26:30
问题 I have some images that will be displayed in a React app. I perform a GET request to a server, which returns images in BLOB format. Then I transform these images to base64. Finally, i'm setting these base64 strings inside the src attribute of an image tag. Recently I've started using the Fetch API. I was wondering if there is a way to do the transforming in 'one' go. Below an example to explain my idea so far and/or if this is even possible with the Fetch API. I haven't found anything online
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