Swoole大数据量传输解决方案

问题：要不压缩的情况下，在Swoole TCP中传输大量数据length>1M
首先用node的mockjs生成一个大于1M的文件

	var jsonfile = require('jsonfile') 	var file = './data.json' 	let fs = require("fs"); 	var Mock = require('mockjs') 	 	function injectContentTofileUntil(fileSizeInMega) { 	    let obj = jsonfile.readFileSync(file) 	    console.log(obj) 	    if(!obj){ 	        obj=[] 	    } 	 	    for (let index = 0; index < 1000; index++) { 	        obj.push({ 	            name: Mock.Random.cname(), 	            country: Mock.Random.county(true), 	        }) 	    } 	 	    jsonfile.writeFileSync(file, obj) 	    let fileSizeInMegabytes = getFileSizeInMega(file) 	    if (fileSizeInMegabytes >= fileSizeInMega) { 	        return true 	    } else { 	        return false 	    } 	} 	 	function getFileSizeInMega(filePath) { 	    let stats = fs.statSync(file) 	    let fileSizeInBytes = stats.size 	    let fileSizeInMegabytes = fileSizeInBytes / 1000000.0 	    return fileSizeInMegabytes 	} 	 	while (!injectContentTofileUntil(1)) { 	    console.log(getFileSizeInMega(file)); 	} 

该文件为大于1M的无序文件，在不使用压缩的情况下传输该文件到server端。

1.正常起server和client传输

Server.php

	error_reporting(0); 	$client = new swoole_client(SWOOLE_SOCK_TCP, SWOOLE_SOCK_ASYNC); 	$filePath = realpath(__DIR__ . '/./jstools/data.json'); 	$fileContent = file_get_contents($filePath); 	 	$client->on("connect", function ($cli) { 	    global $fileContent; 	    $cli->send($fileContent); 	}); 	$client->on("receive", function ($cli, $data) { 	    echo "received: {$data}\n"; 	}); 	$client->on("error", function ($cli) { 	    echo "connect failed\n"; 	}); 	$client->on("close", function ($cli) { 	    echo "connection close\n"; 	}); 	$client->connect("127.0.0.1", 8091, 0.5);  

Client.php

	$server = new swoole_server("0.0.0.0", 8081); 	$server->on('connect', function ($server, $fd){ 	    echo "connection open: {$fd}\n"; 	}); 	$server->on('receive', function ($server, $fd, $reactor_id, $data) { 	    echo "received:" . $data; 	    $server->close($fd); 	    file_put_contents('./response.json', $data); 	}); 	$server->on('close', function ($server, $fd) { 	    echo "connection close: {$fd}\n"; 	}); 	$server->start(); 

执行命令
php server.php
php client.php
报错:
WARNING swReactor_write (ERROR 1201): data is too large, cannot exceed buffer size.
原因:
buffer不足溢出

2.修改buffer不足问题

设置client最大buffer:
"socketbuffersize"=>210241024,

报错:
2018-05-18 17:46:09 *6146.0 ERROR swWorker_discard_data (ERROR 1007): 1received the wrong data8180 bytes from socket#1

原因:
当swoole接收到满足buffer大小的内容时会自动结束传输，已经把数据给消费者，但是数据并没有传输完成，此时有几种方案解决该问题：

• 1.压缩
• 2.告诉swoole到达buffer大小时还没传输结束，本文只讨论此方案

3.实现数据传输切分

server设置：

	'package_eof' => "\r\n\r\n", 	'open_eof_split' => true, 

client设置：

	'package_eof' => "\r\n\r\n", 

可以正常传输。

4.此方案优缺点：

优点：可以正常传输任意大小数据
缺点：需要手动给流增加eof
字段含义请自行查阅swoole文档。

代码地址：https://gitee.com/sharpcx/swoole_big_str