本文介绍了Node.js HTTP获取URL长度限制的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
在Node.js中发出HTTP GET请求时是否有大小限制?如果是这样,我怎么能改变这个?
Is there a limit to the size when making HTTP GET requests in Node.js? And if so, how can I change this?
var url = "..." // very long, ~50'000 chars
http.get(url, function (res) {
res.pipe(fs.createWriteStream("file.txt"));
});
给我这个:
<html><body><h1>400 Bad request</h1>
Your browser sent an invalid request.
</body></html>
在PowerShell或Bash中使用wget的功能完全正常。
Same thing using wget in PowerShell or Bash works perfectly fine.
$url = "..."
wget -outf file.txt $url
推荐答案
Node强制执行内置请求大小限制。请求的标头+ URI不应超过80 kb。
There is a built-in request size limit enforced by Node. Requested headers + URI should not be more than 80 kb.
因为它已定义:
/* Maximium header size allowed */
#define HTTP_MAX_HEADER_SIZE (80*1024)
假设UTF-8字符可以介于两者之间1和4字节,具有50 000个字符的字符串的大小将是从50 000到200 000字节,或从~48kb到195kb。
Asuming that UTF-8 character can be between 1 and 4 bytes, the size of a string with 50 000 characters would be from 50 000 to 200 000 bytes, or from ~48kb to 195kb.
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