如何在php中显示curl中的二进制数据 [英] How to display binary data from curl in php

问题描述

我写简单的php代理，我无法显示png文件，输出是

I'm writing simple php proxy and I have trouble displaying png file, the output is

，应为：

图片已打开在记事本++。我的php curl代码看起来像这样：

The images are opened in Notepad++. My php curl code look like this:

$ua = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.13) Gecko/20080311 Firefox/2.0.0.13';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_USERAGENT, $ua);
curl_setopt($ch, CURLOPT_HEADER_OUT, 1);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
$content = curl_exec($ch);
$info = curl_getinfo($ch);
header('Content-Type:' . $info['content_type']);
echo $content

我尝试使用和不使用CURLOPT_BINARYTRANSFER输出是相同的，不显示。如何显示图片？

I try with and without CURLOPT_BINARYTRANSFER the output is the same and the image is not displaying. How can I display the image?

编辑：当我将数据保存到文件并使用位置标题重定向时，显示图片正确：

EDIT: when I'm saving the data to the file and redirect using Location header the image is displayed correctly:

$file = fopen('proxy_tmp~', 'w');
fwrite($file, $content);
fclose($file);
header('Location: ' . DIR . 'proxy_tmp~');

EDIT 2 ：我有gzip压缩，有同样的问题，当我在记事本++中打开这两个文件是一个是DOS / Windows ANSI（原始），另一个是DOS / Windows UTF-8（由脚本打开的文件）。当我在记事本中打开文件并将编码更改为ANSI并保存文件时，一切正常。

EDIT 2: I had gzip compression, bu when I disabled it I have the same issue, when I open both files in Notepad++ one is DOS/Windows ANSI (original) and the other is DOS/Windows UTF-8 (the file opened by a script). When I open a file in Notepad and change encoding to ANSI and save the file, everything is ok.

推荐答案

Content-Length 头解决了二进制文件代理的问题。

In my case adding Content-Length header fixed problems with binary files proxy.

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