Javascript http resquest中的多个数据包
我对javascript中的http.request有问题。我在网上收到多个包裹。(“数据”)。我明白这是因为我收到的包裹太大(图)。后来我传递了一个.toString('base64') 问题是如何加入不同的包以将它们传递给.toString('base64')。实际上,我试图将所有内容都放在一个字符串中,但是.toString('base64')返回一些我以后无法处理的内容Javascript http resquest中的多个数据包,javascript,node.js,Javascript,Node.js,我对javascript中的http.request有问题。我在网上收到多个包裹。(“数据”)。我明白这是因为我收到的包裹太大(图)。后来我传递了一个.toString('base64') 问题是如何加入不同的包以将它们传递给.toString('base64')。实际上,我试图将所有内容都放在一个字符串中,但是.toString('base64')返回一些我以后无法处理的内容 var file = req.body.file; var post_options = { host: "l
var file = req.body.file;
var post_options = {
host: "localhost",
port: 80,
path: '/api/v1/files/' +file,
method: 'GET',
headers: {
'Authorization': 'Bearer '+ BackendToken.access_token
}
};
var httpg = require('http');
var resultComb ='';
var post_req = httpg.request(post_options, function(res2) {
res2.on('data', function (chunk) {
resultComb += chunk
});
res2.on('end', function(){
var extension = file.split(".").pop()
var src = ''
switch (extension.toLowerCase()) {
case "mp4":
src = 'data:video/mp4;base64,'
break
case "jpg":
case "jpeg":
case "png":
src = 'data:image/png;base64,'
break
case "pdf":
src = 'data:application/pdf;base64,'
break
}
src += resultComb.toString('base64')
res.json({src:src});
});
});
因为您的数据是二进制的,而不是字符串,所以它是一个缓冲区。无法使用+添加缓冲区 将它们放在一个数组中,在
.on('data')
块上放置.push()
,并在.on('end')
块上连接它们。然后转换组合缓冲区
参考:
大概是这样的:
var file = req.body.file;
var post_options = {
host: "localhost",
port: 80,
path: '/api/v1/files/' +file,
method: 'GET',
headers: {
'Authorization': 'Bearer '+ BackendToken.access_token
}
};
var httpg = require('http');
var resultComb = [];
var post_req = httpg.request(post_options, function(res2) {
res2.on('data', function (chunk) {
resultComb.push(chunk);
});
res2.on('end', function(){
var extension = file.split(".").pop()
var src = ''
switch (extension.toLowerCase()) {
case "mp4":
src = 'data:video/mp4;base64,'
break
case "jpg":
case "jpeg":
case "png":
src = 'data:image/png;base64,'
break
case "pdf":
src = 'data:application/pdf;base64,'
break
}
src += Buffer.concat(resultComb).toString('base64')
res.json({src:src});
});
});
因为您的数据是二进制的,而不是字符串,所以它是一个缓冲区。无法使用+添加缓冲区 将它们放在一个数组中,在
.on('data')
块上放置.push()
,并在.on('end')
块上连接它们。然后转换组合缓冲区
参考:
大概是这样的:
var file = req.body.file;
var post_options = {
host: "localhost",
port: 80,
path: '/api/v1/files/' +file,
method: 'GET',
headers: {
'Authorization': 'Bearer '+ BackendToken.access_token
}
};
var httpg = require('http');
var resultComb = [];
var post_req = httpg.request(post_options, function(res2) {
res2.on('data', function (chunk) {
resultComb.push(chunk);
});
res2.on('end', function(){
var extension = file.split(".").pop()
var src = ''
switch (extension.toLowerCase()) {
case "mp4":
src = 'data:video/mp4;base64,'
break
case "jpg":
case "jpeg":
case "png":
src = 'data:image/png;base64,'
break
case "pdf":
src = 'data:application/pdf;base64,'
break
}
src += Buffer.concat(resultComb).toString('base64')
res.json({src:src});
});
});
似乎等于似乎等于