<!--{subtemplate common/header_common}-->	<!--{if $_GET['mod'] == 'viewthread' && !empty($_G['tid'])}-->
	<link rel="canonical" href="https://www.qidao123.com/bbs/thread-{$_G['tid']}-1-1.html" />
	<!--{elseif $_GET['mod'] == 'forumdisplay' && !empty($_G['fid'])}-->
	<link rel="canonical" href="https://www.qidao123.com/bbs/forum-{$_G['fid']}-1.html" />
	<!--{elseif $_GET['mod'] == 'guide'}-->
	<link rel="canonical" href="https://www.qidao123.com/bbs/guide/" />
	<!--{elseif $_G['basescript'] == 'forum' && (empty($_GET['mod']) || $_GET['mod'] == 'index')}-->
	<link rel="canonical" href="https://www.qidao123.com/bbs/" />
	<!--{/if}-->
	r`n`t<meta name="application-name" content="$_G['setting']['bbname']" />
	<meta name="msapplication-tooltip" content="$_G['setting']['bbname']" />
	<!--{if $_G['setting']['portalstatus']}--><meta name="msapplication-task" content="name=$_G['setting']['navs'][1]['navname'];action-uri={echo !empty($_G['setting']['domain']['app']['portal']) ? $_G['scheme'].'://'.$_G['setting']['domain']['app']['portal'] : $_G[siteurl].'portal.php'};icon-uri={$_G[siteurl]}{IMGDIR}/portal.ico" /><!--{/if}-->
	<meta name="msapplication-task" content="name=$_G['setting']['navs'][2]['navname'];action-uri={echo !empty($_G['setting']['domain']['app']['forum']) ? $_G['scheme'].'://'.$_G['setting']['domain']['app']['forum'] : $_G[siteurl].'forum.php'};icon-uri={$_G[siteurl]}{IMGDIR}/bbs.ico" />
	<!--{if $_G['setting']['groupstatus']}--><meta name="msapplication-task" content="name=$_G['setting']['navs'][3]['navname'];action-uri={echo !empty($_G['setting']['domain']['app']['group']) ? $_G['scheme'].'://'.$_G['setting']['domain']['app']['group'] : $_G[siteurl].'group.php'};icon-uri={$_G[siteurl]}{IMGDIR}/group.ico" /><!--{/if}-->
	<!--{if helper_access::check_module('feed')}--><meta name="msapplication-task" content="name=$_G['setting']['navs'][4]['navname'];action-uri={echo !empty($_G['setting']['domain']['app']['home']) ? $_G['scheme'].'://'.$_G['setting']['domain']['app']['home'] : $_G[siteurl].'home.php'};icon-uri={$_G[siteurl]}{IMGDIR}/home.ico" /><!--{/if}-->
	<!--{if $_G['basescript'] == 'forum' && $_G['setting']['archiver']}-->
		<link rel="archives" title="$_G['setting']['bbname']" href="{$_G[siteurl]}archiver/" />
	<!--{/if}-->
	<!--{if !empty($rsshead)}-->$rsshead<!--{/if}-->
	<!--{if widthauto()}-->
		<link rel="stylesheet" id="css_widthauto" type="text/css" href='{$_G['setting']['csspath']}{STYLEID}_widthauto.css?{VERHASH}' />
		<script type="text/javascript">HTMLNODE.className += ' widthauto'</script>
	<!--{/if}-->
	<!--{if $_G['basescript'] == 'forum' || $_G['basescript'] == 'group'}-->
		<script type="text/javascript" src="{$_G[setting][jspath]}forum.js?{VERHASH}"></script>
	<!--{elseif $_G['basescript'] == 'home'}-->
		<script type="text/javascript" src="{$_G[setting][jspath]}home.js?{VERHASH}"></script>
	<!--{elseif $_G['basescript'] == 'portal'}-->
		<script type="text/javascript" src="{$_G[setting][jspath]}portal.js?{VERHASH}"></script>
	<!--{/if}-->
	<!--{if $_G['basescript'] != 'portal' && $_GET['diy'] == 'yes' && check_diy_perm($topic)}-->
		<script type="text/javascript" src="{$_G[setting][jspath]}portal.js?{VERHASH}"></script>
	<!--{/if}-->
	<!--{if $_GET['diy'] == 'yes' && check_diy_perm($topic)}-->
		<link rel="stylesheet" type="text/css" id="diy_common" href="{$_G['setting']['csspath']}{STYLEID}_css_diy.css?{VERHASH}" />
	<!--{/if}-->
</head>

<body id="nv_{$_G[basescript]}" class="pg_{CURMODULE}{if $_G['basescript'] === 'portal' && CURMODULE === 'list' && !empty($cat)} {$cat['bodycss']}{/if}" onkeydown="if(event.keyCode==27) return false;">
	<div id="append_parent"></div><div id="ajaxwaitid"></div>
	<!--{if $_GET['diy'] == 'yes' && check_diy_perm($topic)}-->
		<!--{template common/header_diy}-->
	<!--{/if}-->
	<!--{if check_diy_perm($topic)}-->
		<!--{template common/header_diynav}-->
	<!--{/if}-->
	<!--{if CURMODULE == 'topic' && $topic && empty($topic['useheader']) && check_diy_perm($topic)}-->
		$diynav
	<!--{/if}-->
	<!--{if empty($topic) || $topic['useheader']}-->
		<!--{if $_G['setting']['mobile']['allowmobile'] && (!$_G['setting']['cacheindexlife'] && !$_G['setting']['cachethreadon'] || $_G['uid']) && ($_GET['diy'] != 'yes' || !$_GET['inajax']) && ($_G['mobile'] != '' && $_G['cookie']['mobile'] == '' && $_GET['mobile'] != 'no')}-->
			<div class="xi1 bm bm_c">
			    {lang your_mobile_browser}<a href="{$_G['siteurl']}forum.php?mobile=yes">{lang go_to_mobile}</a> <span class="xg1">|</span> <a href="$_G['setting']['mobile']['nomobileurl']">{lang to_be_continue}</a>
			</div>
		<!--{/if}-->
		<!--{if !empty($_G['setting']['shortcut']) && $_G['member'][credits] >= $_G['setting']['shortcut']}-->
			<div id="shortcut">
				<span><a href="javascript:;" id="shortcutcloseid" title="{lang close}">{lang close}</a></span>
				{lang shortcut_notice}
				<a href="javascript:;" id="shortcuttip">{lang shortcut_add}</a>

			</div>
			<script type="text/javascript">setTimeout(setShortcut, 2000);</script>
		<!--{/if}-->
		<div id="toptb" class="cl">
			<!--{hook/global_cpnav_top}-->
			<div class="wp">
				<div class="z">
					<!--{loop $_G['setting']['topnavs'][0] $nav}-->
						<!--{if is_array($nav) && $nav['available'] && (!$nav['level'] || ($nav['level'] == 1 && $_G['uid']) || ($nav['level'] == 2 && $_G['adminid'] > 0) || ($nav['level'] == 3 && $_G['adminid'] == 1))}-->$nav[code]<!--{/if}-->
					<!--{/loop}-->
					<!--{hook/global_cpnav_extra1}-->
				</div>
				<div class="y">
					<a id="switchblind" href="javascript:;" onclick="toggleBlind(this)" title="{lang switch_blind}" class="switchblind"></a>
					<!--{hook/global_cpnav_extra2}-->
					<!--{loop $_G['setting']['topnavs'][1] $nav}-->
						<!--{if is_array($nav) && $nav['available'] && (!$nav['level'] || ($nav['level'] == 1 && $_G['uid']) || ($nav['level'] == 2 && $_G['adminid'] > 0) || ($nav['level'] == 3 && $_G['adminid'] == 1))}-->$nav[code]<!--{/if}-->
					<!--{/loop}-->
					<!--{if empty($_G['disabledwidthauto']) && $_G['setting']['switchwidthauto']}-->
						<a href="javascript:;" id="switchwidth" onclick="widthauto(this)" title="{if widthauto()}{lang switch_narrow}{else}{lang switch_wide}{/if}" class="switchwidth"><!--{if widthauto()}-->{lang switch_narrow}<!--{else}-->{lang switch_wide}<!--{/if}--></a>
					<!--{/if}-->
					<!--{if $_G['uid'] && !empty($_G['style']['extstyle'])}--><a id="sslct" href="javascript:;" onmouseover="delayShow(this, function() {showMenu({'ctrlid':'sslct','pos':'34!'})});">{lang changestyle}</a><!--{/if}-->
					<!--{if check_diy_perm($topic)}-->
						$diynav
					<!--{/if}-->
				</div>
			</div>
		</div>

		<!--{if !IS_ROBOT}-->
			<!--{if $_G['uid'] && !$_G['setting']['bbclosed'] && empty($_G['member']['freeze']) && $_G['member']['groupid'] != 5}-->
			<ul id="myprompt_menu" class="p_pop" style="display: none;">
				<li><a href="home.php?mod=space&do=pm" id="pm_ntc" style="background-repeat: no-repeat; background-position: 0 50%;"><em class="prompt_news{if empty($_G[member][newpm])}_0{/if}"></em>{lang pm_center}</a></li>
				<!--{if $_G['setting']['followstatus']}-->
					<li><a href="home.php?mod=follow&do=follower"><em class="prompt_follower{if empty($_G[member][newprompt_num][follower])}_0{/if}"></em><!--{lang notice_interactive_follower}-->{if $_G[member][newprompt_num][follower]}($_G[member][newprompt_num][follower]){/if}</a></li>
					<!--{if $_G[member][newprompt] && $_G[member][newprompt_num][follow]}-->
						<li><a href="home.php?mod=follow"><em class="prompt_concern"></em><!--{lang notice_interactive_follow}-->($_G[member][newprompt_num][follow])</a></li>
					<!--{/if}-->
				<!--{/if}-->
				<!--{if $_G[member][newprompt]}-->
					<!--{loop $_G['member']['category_num'] $key $val}-->
						<li><a href="home.php?mod=space&do=notice&view=$key"><em class="notice_$key"></em><!--{echo lang('template', 'notice_'.$key)}-->(<span class="rq">$val</span>)</a></li>
					<!--{/loop}-->
				<!--{/if}-->
				<!--{if empty($_G['cookie']['ignore_notice'])}-->
					<li class="ignore_noticeli"><a href="javascript:;" onclick="setcookie('ignore_notice', 1);hideMenu('myprompt_menu')" title="{lang temporarily_to_remind}"><em class="ignore_notice"></em></a></li>
				<!--{/if}-->
			</ul>
			<!--{/if}-->
			<!--{if $_G['uid'] && !empty($_G['style']['extstyle'])}-->
				<div id="sslct_menu" class="cl p_pop" style="display: none;">
					<!--{if !$_G[style][defaultextstyle]}--><span class="sslct_btn" onclick="extstyle('')" title="{lang default}"><i></i></span><!--{/if}-->
					<!--{loop $_G['style']['extstyle'] $extstyle}-->
						<span class="sslct_btn" onclick="extstyle('$extstyle[0]')" title="$extstyle[1]"><i style='background:$extstyle[2]'></i></span>
					<!--{/loop}-->
				</div>
			<!--{/if}-->
			<!--{if $_G['uid']}-->
				<ul id="myitem_menu" class="p_pop" style="display: none;">
					<!--{if $_G['setting']['forumstatus']}--><li><a href="home.php?mod=space&do=thread&view=me">{lang mypost}</a></li><!--{/if}-->
					<!--{if $_G['setting']['favoritestatus']}--><li><a href="home.php?mod=space&do=favorite&view=me">{lang favorite}</a></li><!--{/if}-->
					<!--{if $_G['setting']['friendstatus']}--><li><a href="home.php?mod=space&do=friend">{lang friends}</a></li><!--{/if}-->
					<!--{hook/global_myitem_extra}-->
				</ul>
			<!--{/if}-->
			<!--{subtemplate common/header_qmenu}-->
		<!--{/if}-->

		<!--{ad/headerbanner/wp a_h}-->
		<div id="hd">
			<div class="wp">
				<div class="hdc cl">
					<!--{eval $mnid = getcurrentnav();}-->
					<h2><!--{if !isset($_G['setting']['navlogos'][$mnid])}--><a href="{if $_G['setting']['domain']['app']['default']}{$_G['scheme']}://{$_G['setting']['domain']['app']['default']}/{else}./{/if}" title="$_G['setting']['bbname']">{$_G['style']['boardlogo']}</a><!--{else}-->$_G['setting']['navlogos'][$mnid]<!--{/if}--></h2>
					<!--{template common/header_userstatus}-->
				</div>

				<div id="nv">
					<a href="javascript:;" id="qmenu" onmouseover="delayShow(this, function () {showMenu({'ctrlid':'qmenu','pos':'34!','ctrlclass':'a','duration':2});showForummenu($_G[fid]);})">{lang my_nav}</a>
					<ul>
						<!--{loop $_G['setting']['navs'] $nav}-->
							<!--{if is_array($nav) && $nav['available'] && (!$nav['level'] || ($nav['level'] == 1 && $_G['uid']) || ($nav['level'] == 2 && $_G['adminid'] > 0) || ($nav['level'] == 3 && $_G['adminid'] == 1))}--><li {if $mnid == $nav[navid] || substr($_SERVER['REQUEST_URI'], 1) == str_replace('./', '', $nav[filename])}class="a" {/if}$nav[nav]></li><!--{/if}-->
						<!--{/loop}-->
					</ul>
					<!--{hook/global_nav_extra}-->
				</div>
				<!--{if !empty($_G['setting']['plugins']['jsmenu'])}-->
					<ul class="p_pop h_pop" id="plugin_menu" style="display: none">
					<!--{loop $_G['setting']['plugins']['jsmenu'] $module}-->
						 <!--{if in_array($module['adminid'], array(0, -1)) || ($module['adminid'] && $_G['adminid'] > 0 && $module['adminid'] >= $_G['adminid'])}-->
						 <li>$module[url]</li>
						 <!--{/if}-->
					<!--{/loop}-->
					</ul>
				<!--{/if}-->
				$_G[setting][menunavs]
				<div id="mu" class="cl">
				<!--{if $_G['setting']['subnavs']}-->
					<!--{loop $_G[setting][subnavs] $navid $subnav}-->
						<!--{if $_G['setting']['navsubhover'] || $mnid == $navid}-->
						<ul class="cl {if $mnid == $navid}current{/if}" id="snav_$navid"{if $mnid != $navid} style="display:none"{/if}>
						$subnav
						</ul>
						<!--{/if}-->
					<!--{/loop}-->
				<!--{/if}-->
				</div>
				<!--{ad/subnavbanner/a_mu}-->
				<!--{subtemplate common/pubsearchform}-->
			</div>
		</div>

		<!--{hook/global_header}-->
	<!--{/if}-->

	<div id="wp" class="wp">

qidao123.com ToB IT社区-企服评测·应用市场»论坛 › 主机系统 › linux › Http请求转发服务器实现
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Http请求转发服务器实现

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发表于 2024-11-10 23:40:08 | 显示全部楼层 |阅读模式

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Http请求转发服务器实现

需求场景

云服务器通过VPN连接了现场的n台工控机,每台工控机上都在跑web程序,如今我想通过公网直接访问工控机上的web服务,给客户检察现场的具体运行情况,而不是让客户再装一个VPN,简化操作。
如今我们有以下几种方案可以实现:
1.使用代理,将每台工控机的web服务端口代理到云服务器上的一个空闲端口,这种方式的优点是不需要额外写代码实现,只需要通过配置代理即可,缺点是云服务器上端口占用过多,每打开现场的网址url上面都会带一个端标语。
2.使用Http请求转发服务器,将现场和他对应的VPN的ip地址映射起来存到数据库里,前端先请求服务器当地IP地址(127.0.0.1),当通过主界面跳转到某个现场时,通过数据库查询现场VPN的IP地址,然后将之后的请求都转发到对应的VPN地址,即可获取对应现场的数据
具体实现

使用Python实现请求转发服务器


  • 使用Python实现请求转发服务器非常简单,用flask库即可轻松实现
    1. import queue
    2. import threading
    3. import requests
    4. from flask import Flask, request, jsonify
    5. from log import log
    6. # 初始化Flask应用
    7. app = Flask(__name__, static_folder="dist")
    8. # 捕获所有请求并转发
    9. @app.route("/", defaults={"path": ""}, methods=["GET", "POST", "PUT", "DELETE"])
    10. @app.route("/<path:path>", methods=["GET", "POST", "PUT", "DELETE"])
    11. def catch_all(path):
    12.     # 构建转发的目标 URL,我这里将请求都转发到10.8.0.126服务器上
    13.     forward_url = f"http://10.8.0.126/{path}"
    14.     # 转发请求,并传递请求头、数据以及文件(如果有)
    15.     headers = {key: value for key, value in request.headers if key != "Host"}
    16.     # 获取请求的数据,根据请求方法选择适当的数据处理方式
    17.     data = request.get_json() if request.is_json else request.form or request.data
    18.     json_data = data or {}
    19.     try:
    20.         response = requests.request(
    21.             method=request.method,
    22.             url=forward_url,
    23.             headers=headers,
    24.             json=json_data,
    25.             files=request.files,
    26.             params=request.args,
    27.         )
    28.     except requests.RequestException as e:
    29.         return str(e), 500
    30.     # 返回转发请求的响应
    31.     return response.content, response.status_code, response.headers.items()
    32. if __name__ == "__main__":
    33.     app.run(debug=False, host="0.0.0.0", port=9095)
    复制代码
  • 安装gunicorn库,部署转发服务程序(普通运行只供调试使用,不实用于生产情况)
    1. pip install gunicorn
    复制代码
  • 运行转发服务程序
    1. gunicorn -b 0.0.0.0 -w 4 main:app
    复制代码

使用C++实现请求转发服务器

在用Python完成请求转发服务器的开辟后,方案却被领导否决了,因为后台程序都是用C++写的,用Python写不好融合,然后我继续开始研究C++服务端的方案,先采用cpp-httplib库实现。

  • 代码实现,这里捕捉所有请求使用了正则表达式,刚开始因为对这个库和正则不熟悉,卡了较长时间。
    1. #include <iostream>
    2. #include <httplib.h>
    3. #include <string>
    4. // 定义一个简单的路由处理器
    5. void catch_all(const httplib::Request& req, httplib::Response& res)
    6. {
    7.     // 构建转发的目标 URL
    8.     std::string path = req.path;
    9.     std::cout << "path: " << path << std::endl;
    10.     std::cout << "method: " << req.method << std::endl;
    11.     std::string forward_url = "http://10.8.0.126/" + path;
    12.     // 转发请求,并传递请求头、数据以及文件(如果有)
    13.     httplib::Headers headers;
    14.     headers = req.headers;
    15.     headers.erase("Host");
    16.     // 获取请求的数据,根据请求方法选择适当的数据处理方式
    17.     std::string data;
    18.     data = req.body;
    19.     // 使用 httplib 客户端进行转发
    20.     httplib::Client client("10.10.112.139", 9092);
    21.     httplib::Result result;
    22.     if (req.method == "GET") {
    23.         result = client.Get(path, headers);
    24.     } else if (req.method == "POST") {
    25.         result = client.Post(path, headers, data, "application/json");
    26.         std::cout << result->body << std::endl;
    27.     } else if (req.method == "PUT") {
    28.         result = client.Put(path, headers, data, "application/json");
    29.     } else if (req.method == "DELETE") {
    30.         result = client.Delete(path, headers);
    31.     } else {
    32.         res.set_content("Unsupported method", "text/plain");
    33.         res.status = 405;
    34.         return;
    35.     }
    36.     if (result && result->status == 200) {
    37.         res.set_content(result->body, result->get_header_value("Content-Type"));
    38.         res.status = result->status;
    39.         for (const auto& header : result->headers) {
    40.             res.headers.emplace(header.first, header.second);
    41.         }
    42.     } else {
    43.         res.set_content("Forward request failed", "text/plain");
    44.         res.status = 500;
    45.     }
    46. }
    47. int main()
    48. {
    49.     httplib::Server svr;
    50.     // 捕获所有请求并转发
    51.     svr.Get(R"(/.*)", &catch_all);
    52.     svr.Post(R"(/.*)", &catch_all);
    53.     auto ret = svr.set_mount_point("/", "/home/narada/ems/www");
    54.     svr.listen("0.0.0.0", 8080);
    55.     return 0;
    56. }
    复制代码
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