我试图找出如何使用NodeJS发送HTTP / 2 POST请求。我离文档中的示例到目前为止:
const http2 = require('http2');
const fs = require('fs');
const client = http2.connect('https://localhost:8443', {
ca: fs.readFileSync('localhost-cert.pem')
});
client.on('error', (err) => console.error(err));
client.on('socketError', (err) => console.error(err));
const req = client.request({ ':path': '/' });
req.on('response', (headers, flags) => {
for (const name in headers) {
console.log(`${name}: ${headers[name]}`);
}
});
req.setEncoding('utf8');
let data = '';
req.on('data', (chunk) => { data += chunk; });
req.on('end', () => {
console.log(`\n${data}`);
client.close();
});
req.end();
但是我不清楚如何实际设置要作为POST发送的数据。
答案 0 :(得分:5)
如果你需要将对象发布为json - 你应该将其字符串化并包装在缓冲区中。以下是适用于我的代码:
const http2 = require('http2');
const post = (url, path, body) => new Promise((resolve) => {
const client = http2.connect(url);
const buffer = new Buffer(JSON.stringify(body));
const req = client.request({
[http2.constants.HTTP2_HEADER_SCHEME]: "https",
[http2.constants.HTTP2_HEADER_METHOD]: http2.constants.HTTP2_METHOD_POST,
[http2.constants.HTTP2_HEADER_PATH]: `/${path}`,
"Content-Type": "application/json",
"Content-Length": buffer.length,
});
req.setEncoding('utf8');
let data = [];
req.on('data', (chunk) => {
data.push(chunk);
});
req.write(buffer);
req.end();
req.on('end', () => {
resolve(data: data.join());
});
});
答案 1 :(得分:3)
在各处拼凑了一些信息之后,我终于设法解决了这个问题。这是一个模板示例。关键是在req.write()中。老实说,我无法找到任何关于如何包含身体的直接答案。几乎每个例子都没有身体!希望这有助于其他人。注意:这是Node-red,因此是global.get语句,但也可以将那些更改为require(' module'):
const fs = global.get('fs');
const http2 = global.get('http2');
fs.readFile('turn-off-the-desklight.raw', function(err, content){
if(err){
node.send(err);
}
var metadata = JSON.stringify(
{
"context": [
{
"header": {
"namespace": "SpeechRecognizer",
"name": "RecognizerState"
},
"payload": {
}
},
{
"header": {
"namespace": "Speaker",
"name": "VolumeState"
},
"payload": {
"volume": 10,
"muted": false
}
},
{
"header": {
"namespace": "Alerts",
"name": "AlertsState"
},
"payload": {
"allAlerts": [],
"activeAlerts": []
}
},
{
"header": {
"namespace": "SpeechSynthesizer",
"name": "SpeechState"
},
"payload": {
"token": "",
"offsetInMilliseconds": 0,
"playerActivity": "FINISHED"
}
},
{
"header": {
"namespace": "AudioPlayer",
"name": "PlaybackState"
},
"payload": {
"token": "",
"offsetInMilliseconds": 0,
"playerActivity": "IDLE"
}
}
],
"event": {
"header": {
"namespace": "SpeechRecognizer",
"name": "Recognize",
"messageId": "1eff3c5e-02e3-4dd3-9ca0-7c38937f005f",
"dialogRequestId": "a905c2bb-1bbd-45cf-9f85-6563d2546492"
},
"payload": {
"profile": "FAR_FIELD",
"format": "AUDIO_L16_RATE_16000_CHANNELS_1"
}
}
});
var data = "--this-is-my-boundary-for-alexa\r\n";
data += 'Content-Disposition: form-data; name="metadata"\r\n';
data +='Content-Type: application/json; charset=UTF-8\r\n\r\n';
data += metadata;
data += "\r\n";
data += "--this-is-my-boundary-for-alexa\r\n";
data += "Content-Disposition: form-data; name=\"audio\"\r\n";
data += "Content-Type:application/octet-stream\r\n\r\n";
var payload = Buffer.concat([
Buffer.from(data, "utf8"),
new Buffer(content, 'binary'),
Buffer.from("\r\n--this-is-my-boundary-for-alexa\r\n", "utf8"),
]);
const client = global.get('alexaClient');
client.on('error', (err) => node.send({payload:err}));
client.on('socketError', (err) => node.send({payload:err}));
var request = {
':method' : 'POST',
':scheme' : 'https',
':path' : '/v20160207/events',
'authorization' : 'Bearer <valid token>',
'content-type' : 'multipart/form-data; boundary=this-is-my-boundary-for-alexa'
};
var req = client.request(request);
req.on('response', (headers, flags) => {
for (const name in headers) {
if(name === ':status') {
node.send({payload:`${name}: ${headers[name]}`});
}
}
});
req.on('error', function(err) {
node.send(err);
});
req.setEncoding('utf8');
let outdata = '';
req.on('data', (chunk) => { outdata += chunk; });
req.on('end', () => {
node.send({payload:outdata});
});
req.write(payload);
req.end();
});
答案 2 :(得分:0)
尝试按以下方式撰写您的请求正文:
{
method:'POST'
headers:...
body:...
}
有不同的方式发布数据,正文或表格等。下载邮递员,在其中配置您的发布请求,它具有生成不同语言的代码示例的功能。 Node.JS就是其中之一。
我还建议您使用request
包。它封装了一些功能,使接收数据更容易。 request
答案 3 :(得分:0)
您可以将数据发送到服务器并从服务器接收数据。
1)客户
const http2 = require('http2');
var port = 15000;
const client = http2.connect('https://localhost:15000/');
// Must not specify the ':path' and ':scheme' headers
// for CONNECT requests or an error will be thrown.
var body = "Hello, I am babatman";
const req = client.request({
':method': 'POST',
':authority': `localhost:${port}`,
'body': body
});
req.on('response', (headers) => {
console.log(headers[http2.constants.HTTP2_HEADER_STATUS]);
});
let data = '';
req.setEncoding('utf8');
req.on('data', (chunk) => data += chunk);
req.on('end', () => {
console.log(`The server says: ${data}`);
client.close();
});
2)服务器
app.use(async ctx => {
console.log(ctx.request);
ctx.response.status = 201;
ctx.body = "hello";
console.log("Response 201 was send.")
});