我在使用 Node.js 时遇到了一个奇怪的行为 http.get .我使用 ajax 向 url 发出请求，并希望将结果输入我的浏览器。但我只得到了一些 <head>标记内容，仅此而已，没有 <body>内容。但是，如果我将结果发送到系统控制台( console.log(chunk) )，我会得到我想要的结果 - 整页。这是我的步骤:
// Simple jQuery Ajax GET
$.ajax({
type: "GET",
url: "/myapppath", // send to my app's url
data: {foo: "bar"},
success: onLoad, // the callback, see just bellow
error: onError,
dataType: "text"
});
// With this callback function I want to insert the result into <div id="baz">
function onLoad(resp) {
document.getElementById("baz").innnerHTML = resp;
}
// In /myapppath
http.get("http://stackoverflow.com/", function(result) {
result.setEncoding('utf8');
result.on("data", function(chunk) {
console.log(chunk); // this successfully returns the whole page but into system console
res.end(chunk); // this returns just a piece of <head> tag into the browser.
});
});
所以在我的<div id="baz">我只得到一些 <head> http://stackoverflow.com/ 的标签请求，否 <body>标签及其内容。这就是我得到的全部<div id="baz">而不是整个页面:
<!DOCTYPE html>
<html>
<head>
<title>Stack Overflow</title>
<link rel="shortcut icon" href="https://cdn.sstatic.net/stackoverflow/img/favicon.ico">
<link rel="apple-touch-icon image_src" href="https://cdn.sstatic.net/stackoverflow/img/apple-touch-icon.png">
<link rel="search" type="application/opensearchdescription+xml" title="Stack Overflow" href="/opensearch.xml">
<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script type="text/javascript" src="https://cdn.sstatic.net/js/stub.js?v=dd6898efd655"></script>
<link rel="stylesheet" type="text/css" href="https://cdn.sstatic.net/stackoverflow/all.css?v=8a5907e853ab">
<link rel="alternate" type="application/atom+xml" title="Feed of recent questions" href="/feeds">
<script type="text/javascript" defer>
</script>
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</h
但是在 console.log(chunk)如上所述，我在控制台中打印了整个页面。
发生了什么事？为什么http.get没有向浏览器返回完整响应？我错过了什么？什么削减了响应？
最佳答案
console.log(chunk); 实际上并没有一次记录整个页面，但它确实将每个 chunk 记录为更多 'data' 到了。
res.end()另一方面，在第一次调用后关闭连接时变为无操作，因此仅包含第一个 chunk。
你可以做的是res.write() 'data'的每个chunk，等待'end'到 res.end():
http.get("http://stackoverflow.com/", function (result) {
result.on('data', function (chunk) {
res.write(chunk);
});
result.on('end', function () {
res.end();
});
});
或者，因为 result 是 Stream.Readable ( IncomingMessage ) 和 res 大概是 Stream.Writable (猜测 ServerResponse )，您应该能够 .pipe()他们:
http.get('http://stackoverflow.com', function (result) {
result.pipe(res);
});
关于Node.js` "http.get"不会将完整的响应正文返回给浏览器，而只是返回一个 <head> 标签。如何获得全面回应？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/17864535/