关于Http客户端download时请求头Range

[Dmcz]

问题描述

在使用http客户端下载文件时, 对端返回的http status code 为 419. 测试后发现下载文件的请求头中包含了 Range 但是为空. 示例:

Host: 192.168.8.52
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Accept-Encoding: gzip
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36
Content-Type: application/x-www-form-urlencoded
Range: 

这并不符合: Range: bytes=start-end 的格式。因此服务端会判定为异常并返回code 419.
于是试图换个思路，通过传递headers来复写请求头中的header。
当我传递Range: bytes=1-后, 发现请求头中的Range消失了....，文件可以正常的下载

虽然目前解决了业务中的问题，但是感觉这应该属于不合理的地方。
应该修改withDownloadOffset方法当offset = 0时请求头不包含Range

或者有没有更合适的方法来解决这个问题。 请大佬们帮忙看看。

版本信息

composer info | grep saber
swlib/saber                        v1.x-dev 7b97f01   Swoole coroutine HTTP client

PHP 8.0.10 (cli) (built: Aug 27 2021 01:57:09) ( NTS )
Copyright (c) The PHP Group
Zend Engine v4.0.10, Copyright (c) Zend Technologies

swoole

Swoole => enabled
Author => Swoole Team <team@swoole.com>
Version => 4.6.7
Built => Sep  6 2021 02:26:14
coroutine => enabled with boost asm context
epoll => enabled
eventfd => enabled
signalfd => enabled
spinlock => enabled
rwlock => enabled
openssl => OpenSSL 1.1.1l  24 Aug 2021
dtls => enabled
http2 => enabled
json => enabled
curl-native => enabled
pcre => enabled
zlib => 1.2.11
mutex_timedlock => enabled
pthread_barrier => enabled
async_redis => enabled

示例代码及结果

<?php

use Swlib\Saber;
use Swlib\SaberGM;
use Swlib\Http\Exception\RequestException;

require 'base.php';

\Swoole\Coroutine\run(function () {
    $url = 'http://192.168.8.52/group1/M00/00/00/wKgINGFEMNSAH4vNAAAsk_heX2w512.jpg?token=9ad2493d8d0c3ab2eab7d419d277992d&ts=1631953656';

    $client = Saber::create();

    // 请求头中存在Range, 但是Range为空
    $request = $client->download($url, './test', 0, [
        'timeout' => 60,
        'psr' => true
    ]);
    echo $request->getHeadersString() . PHP_EOL;
    echo '-----------' . PHP_EOL;

    // 请求头中存在Range, Range为  Range: bytes=5-
    $request = $client->download($url, './test', 5, [
        'timeout' => 60,
        'psr' => true
    ]);
    echo $request->getHeadersString() . PHP_EOL;
    echo '-----------' . PHP_EOL;
    
    // 请求头中不存在Range
    $request = $client->download($url, './test', 0, [
        'timeout' => 60,
        'psr' => true,
        'headers' =>[
            'Range' => 'bytes=1-',
            'Test' => 'bytes=1-',
        ]
    ]);
    echo $request->getHeadersString() . PHP_EOL;
    echo '-----------' . PHP_EOL;

    // 请求头中存在Range, Range为  Range: bytes=5- 
    $request = $client->download($url, './test', 5, [
        'timeout' => 60,
        'psr' => true,
        'headers' =>[
            'Range' => 'bytes=1-',
            'Test' => 'bytes=1-',
        ]
    ]);
    echo $request->getHeadersString() . PHP_EOL;
    echo '-----------' . PHP_EOL;
    
});

Host: 192.168.8.52
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Accept-Encoding: gzip
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36
Content-Type: application/x-www-form-urlencoded
Range:
-----------
Host: 192.168.8.52
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Accept-Encoding: gzip
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36
Content-Type: application/x-www-form-urlencoded
Range: bytes=5-
-----------
Host: 192.168.8.52
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Accept-Encoding: gzip
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36
Content-Type: application/x-www-form-urlencoded
Test: bytes=1-
-----------
Host: 192.168.8.52
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Accept-Encoding: gzip
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.132 Safari/537.36
Content-Type: application/x-www-form-urlencoded
Test: bytes=1-
Range: bytes=5-
-----------