用C写CGI怎么能输出header等这些信息？

coldice 2001-07-16 10:25:50
我在用C写CGI的过程中，发现使用一些CGI库都能方便的输出html正文，
但我想写一个重定向的cgi程序，使用<meta>当然可以了。但总觉得别扭。赫赫。


能不能在C程序中直接输出一些类似于php中header之类的重定向语句？
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Tasehouny 2001-07-17
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网上有C CGI_LIB 记不得下载地址了。
我的硬盘上好像有。 tase@263.net
wyzegg 2001-07-16
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当然可以啦，大家都是一个原理吗
VC MFC专题讲座 chm
看好在下：
第一章 CGI
第二章 ACTIVEX
第三章：异常处理
第四章 多线程/多进程
……
……
1.1 如何编写CGI程序

CGI的工作原理介绍：CGI（Common Gateway Interface）是一个WEB服务器提供信息服务的标准接口，通过这样一个接口，WEB服务器能够执行程序，并将程序输出的信息返回给浏览器。因为在WEB网上的数据都是静态的，通过CGI程序能够动态的处理浏览者的请求，如保存用户输入的信息，根据用户信息返回相关的资料等等。当客户端发送一个CGI请求给WEB服务器后，WEB服务器将根据CGI程序的类型决定数据向CGI程序的传送方式，一般来讲是通过标准输入/输出流和环境变量来与CGI程序间传递数据。
……
……
.3 利用ISAPI开发CGI程序

我们所使用的ISAPI扩展类是由CHttpServer所派生，可以调用CHttpServer::AddHeader来指明返回数据的类型，例如下面的代码演示了输出纯文本：

void CTestisaExtension::Default(CHttpServerContext* pCtxt)
{
AddHeader(pCtxt, "Content-type = text/plain\r\n");
(*pCtxt) << "Hello world!\r\n";
}

我们可以重载某些函数来达到加强控制的目的，可重载的函数有以下这些：
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pCtxt)\u003Cbr\u003E{\u003Cbr\u003E\tAdd\u003Cem\u003EHeader\u003C\u002Fem\u003E(pCtxt, \"Content-type = text\u002Fplain\\r\\n\");\u003Cbr\u003E\t(*pCtxt) \u003C\u003C \"Hello world!\\r\\n\"; \u003Cbr\u003E}\u003Cbr\u003E\u003Cbr\u003E我们可以重载某些函数来达到加强控制的目的，可重载的函数有以下这些： \u003Cbr\u003Evirtual LPCTSTR CHttpServer::GetTitle( ) const;返回\u003CTITLE\u003E部分\u003Cem\u003E信息\u003C\u002Fem\u003E \u003Cbr\u003Evirtual BOOL CHttpServer::OnParseError( CHttpServerContext* pCtxt, int nCause );错误处理 \u003Cbr\u003Evirtual void CHttpServer::StartContent( CHttpServerContext* pCtxt ) const;\u003Cem\u003E输出\u003C\u002Fem\u003E\u003CHTML\u003E\u003CBODY\u003E部分\u003Cem\u003E信息\u003C\u002Fem\u003E \u003Cbr\u003Evirtual void CHttpServer::EndContent( CHttpServerContext* pCtxt ) const;\u003Cem\u003E输出\u003C\u002Fem\u003E\u003C\u002FBODY\u003E\u003C\u002FHTML\u003E部分\u003Cem\u003E信息\u003C\u002Fem\u003E \u003Cbr\u003Evirtual void CHttpServer::WriteTitle( CHttpServerContext* pCtxt ) 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\u003Cbr\u003ELPBYTE lpbData; \u002F\u002FIN \u003Cbr\u003ELPSTR lpszContentType; \u002F\u002FIN CONTENT_TYPE \u003Cbr\u003E...其他\u003Cem\u003E信息\u003C\u002Fem\u003E在此忽略 \u003Cbr\u003E} EXTENSION_CONTROL_BLOCK, *LPEXTENSION_CONTROL_BLOCK; \u003Cbr\u003E……\u003Cbr\u003E……4.1 为什么需要多进程\u002F线程\u003Cbr\u003E\u003Cbr\u003E\u003Cbr\u003E\u003Cbr\u003E","createTime":"2008-05-09 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cd \u002Fpentest\u002Fweb\u002Fnikto\u002F\nroot@91ri.org:\u002Fpentest\u002Fweb\u002Fnikto# ls\ndocs nikto.conf nikto.pl plugins templates\nroot@91ri.org:\u002Fpentest\u002Fweb\u002Fnikto# .\u002Fnikto.pl -h\nOption host requires an argument\n\n-config+ Use this config file\n-\u003Cem\u003ECgi\u003C\u002Fem\u003Edirs+ scan these \u003Cem\u003ECGI\u003C\u002Fem\u003E dirs: ‘none’, ‘all’, or values like “\u002F\u003Cem\u003Ecgi\u003C\u002Fem\u003E\u002F \u002F\u003Cem\u003Ecgi\u003C\u002Fem\u003E-a\u002F”\n-dbcheck check database and other key files for syntax errors\n-Display+ Turn on\u002Foff display outputs\n-evasion+ ids evasion technique\n-Format+ save file (-o) format\n-host+ target host\n-Help Extended help information\n-id+ Host authentication to use, format is id:pass or id:pass:realm\n-list-plugins List all available plugins\n-mutate+ Guess additional file names\n-mutate-options+ Provide extra information for mutations\n-output+ Write output to this file\n-nocache Disables the URI cache\n-nossl Disables using SSL\n-no404 Disables 404 checks\n-port+ Port to use (default 80)\n-Plugins+ List of plugins to run (default: ALL)\n-root+ Prepend root value to all requests, format is \u002Fdirectory\n-ssl Force ssl mode on port\n-Single Single request mode\n-timeout+ Timeout (default 2 seconds)\n-Tuning+ Scan tuning\n-update Update databases and plugins from CIRT.net\n-vhost+ Virtual host (for Host \u003Cem\u003Eheader\u003C\u002Fem\u003E)\n-Version Print plugin and database versions\n+ requires a value\n\nNote: This is the short help output. Use -H for full help.\n\n升级插件\n\nroot@91ri.org:\u002Fpentest\u002Fweb\u002Fnikto# .\u002Fnikto.pl -update\n\n-h 指定扫描的目标 –p 端口\n\nroot@91ri.org:\u002Fpentest\u002Fweb\u002Fnikto# .\u002Fnikto.pl -h www.91ri.org -p 80\n\n-C 指定\u003Cem\u003ECGI\u003C\u002Fem\u003E目录 –all表示猜解\u003Cem\u003ECGI\u003C\u002Fem\u003E目录\n\nroot@91ri.org:\u002Fpentest\u002Fweb\u002Fnikto# .\u002Fnikto.pl -h www.91ri.org -C all\n\n-T选项包含很多小选项 –T 9表示扫描SQL注入漏洞\n\nroot@91ri.org:\u002Fpentest\u002Fweb\u002Fnikto# .\u002Fnikto.pl -h www.91ri.org -T 9\n\n-D指定\u003Cem\u003E输出\u003C\u002Fem\u003E显示 2显示cookies\n\nroot@91ri.org:\u002Fpentest\u002Fweb\u002Fnikto# .\u002Fnikto.pl -h www.91ri.org -D 2\n\n-T选项包含的小选项解释：\n0 检查文件上传页面\n1 检查web日志\n2 检查错误配置或默认文件\n3检查\u003Cem\u003E信息\u003C\u002Fem\u003E泄露问题\n4 检查XSS\u002FScript\u002FHTML问题\n5 从根目录检查是否存在可访问的文件\n6 检查拒绝服务问题\n7 从任意文件检索是否存在可访问文件\n8 检查是否存在系统命令执行漏洞\n9 检查SQL注入漏洞\na 检查认证绕过问题\nb 识别安装的软件版本\nc 检查源代码泄露问题\nx 反向链接选项","createTime":"2013-08-14 16:22:01","dataReportQuery":"spm=1035.2023.3001.6557&utm_medium=distribute.pc_relevant_bbs_down_v2.none-task-download-2~default~OPENSEARCH~Rate-2-5945381-bbs-177807.264^v3^pc_relevant_bbs_down_v2_default&depth_1-utm_source=distribute.pc_relevant_bbs_down_v2.none-task-download-2~default~OPENSEARCH~Rate-2-5945381-bbs-177807.264^v3^pc_relevant_bbs_down_v2_default","dataReportClick":"{\"mod\":\"popu_645\",\"index\":\"2\",\"dest\":\"https:\u002F\u002Fdownload.csdn.net\u002Fdownload\u002Fsayu3368\u002F5945381\",\"strategy\":\"2~default~OPENSEARCH~Rate\",\"extra\":\"{\\\"utm_medium\\\":\\\"distribute.pc_relevant_bbs_down_v2.none-task-download-2~default~OPENSEARCH~Rate-2-5945381-bbs-177807.264^v3^pc_relevant_bbs_down_v2_default\\\",\\\"dist_request_id\\\":\\\"1714016380699_66911\\\"}\",\"spm\":\"1035.2023.3001.6557\"}","dataReportView":"{\"mod\":\"popu_645\",\"index\":\"2\",\"dest\":\"https:\u002F\u002Fdownload.csdn.net\u002Fdownload\u002Fsayu3368\u002F5945381\",\"strategy\":\"2~default~OPENSEARCH~Rate\",\"extra\":\"{\\\"utm_medium\\\":\\\"distribute.pc_relevant_bbs_down_v2.none-task-download-2~default~OPENSEARCH~Rate-2-5945381-bbs-177807.264^v3^pc_relevant_bbs_down_v2_default\\\",\\\"dist_request_id\\\":\\\"1714016380699_66911\\\"}\",\"spm\":\"1035.2023.3001.6557\"}","type":"download"},{"url":"https:\u002F\u002Fblog.csdn.net\u002Fweixin_30849279\u002Farticle\u002Fdetails\u002F117120249","title":"c语言实现\u003Cem\u003Ecgi\u003C\u002Fem\u003E返回结果转json,如何從Perl \u003Cem\u003ECGI\u003C\u002Fem\u003E程序發送JSON響應？","desc":"I am writing a JSON response from a perl\u002F\u003Cem\u003Ecgi\u003C\u002Fem\u003E program. The \u003Cem\u003Eheader\u003C\u002Fem\u003E's content type needs to be \"application\u002Fjson\". But it doesn't seems to be recognized as response is thrown as a text file.我正在寫一個來自perl ...","createTime":"2021-05-21 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Started with \u003Cem\u003ECGI\u003C\u002Fem\u003E Programming in C。因为本人水平有限，难免有误，欢迎指正。\n\n这是一篇介绍如何使用C语言进行\u003Cem\u003ECGI\u003C\u002Fem\u003E编程的文章。假设读者了解C基础知识，并且可以\u003Cem\u003E写\u003C\u002Fem\u003E出简单的HTML表单和在Web服务器上安装\u003Cem\u003ECGI\u003C\u002Fem\u003E脚本。通过简单的范例对原理进行解释说明。\n\n两点重要提醒：\n\n为了避免浪费时间，请检查——通过恰当的本地文档或者联系Web服务器管理员—...","createTime":"2019-06-27 10:51:51","dataReportQuery":"spm=1035.2023.3001.6557&utm_medium=distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~OPENSEARCH~Rate-4-93855355-bbs-177807.264^v3^pc_relevant_bbs_down_v2_default&depth_1-utm_source=distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~OPENSEARCH~Rate-4-93855355-bbs-177807.264^v3^pc_relevant_bbs_down_v2_default","dataReportClick":"{\"mod\":\"popu_645\",\"index\":\"4\",\"dest\":\"https:\u002F\u002Fblog.csdn.net\u002FY_Hanxiao\u002Farticle\u002Fdetails\u002F93855355\",\"strategy\":\"2~default~OPENSEARCH~Rate\",\"extra\":\"{\\\"utm_medium\\\":\\\"distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~OPENSEARCH~Rate-4-93855355-bbs-177807.264^v3^pc_relevant_bbs_down_v2_default\\\",\\\"dist_request_id\\\":\\\"1714016380699_66911\\\"}\",\"spm\":\"1035.2023.3001.6557\"}","dataReportView":"{\"mod\":\"popu_645\",\"index\":\"4\",\"dest\":\"https:\u002F\u002Fblog.csdn.net\u002FY_Hanxiao\u002Farticle\u002Fdetails\u002F93855355\",\"strategy\":\"2~default~OPENSEARCH~Rate\",\"extra\":\"{\\\"utm_medium\\\":\\\"distribute.pc_relevant_bbs_down_v2.none-task-blog-2~default~OPENSEARCH~Rate-4-93855355-bbs-177807.264^v3^pc_relevant_bbs_down_v2_default\\\",\\\"dist_request_id\\\":\\\"1714016380699_66911\\\"}\",\"spm\":\"1035.2023.3001.6557\"}","type":"blog"},{"url":"https:\u002F\u002Fblog.csdn.net\u002FshuaiAWP\u002Farticle\u002Fdetails\u002F46776545","title":"\u003Cem\u003Ecgi\u003C\u002Fem\u003E_\u003Cem\u003Eheader\u003C\u002Fem\u003E: unable to find LFLF","desc":"我非常恶心做嵌入式web\r\n出错位置\r\n      \u003Cem\u003Ecgi\u003C\u002Fem\u003E_procee_\u003Cem\u003Eheader\u003C\u002Fem\u003E()\r\n对于错误 \u003Cem\u003Ecgi\u003C\u002Fem\u003E_\u003Cem\u003Eheader\u003C\u002Fem\u003E: unable to find LFLF的补充\r\n浏览器中显示502 Bad Gateway\r\nThe \u003Cem\u003ECGI\u003C\u002Fem\u003E was not \u003Cem\u003ECGI\u003C\u002Fem\u003E\u002F1.1 compliant.\r\n可能的原因:\r\n\u003Cem\u003E输出\u003C\u002Fem\u003EMIME格式错误，结尾一定要有两个换行符\r\nprintf(\"Content-Type:","createTime":"2015-07-06 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技术英雄会","url":"https:\u002F\u002Flive.csdn.net\u002Froom\u002Fiframe\u002Fcsdnnews\u002FfsNR5NWp?chat=1&title=1&footer=1","images":["https:\u002F\u002Fimg-home.csdnimg.cn\u002Fimages\u002F20221016050009.png"],"ext":{"time":"9:00","liveRoomUrl":"https:\u002F\u002Flive.csdn.net\u002Froom\u002Fcsdnnews\u002FfsNR5NWp"}}]},"isGooglebot":false,"canonical":"https:\u002F\u002Fwww.csdn.net\u002Ftopics\u002F177807","openUrl":"","isApp":false,"localUrl":"https:\u002F\u002Fbbs.csdn.net\u002Ftopics\u002F177807","typeId":"index","hasIndex":false},"CFG":{"ALIPLAYER_VERSION":"v4","ALIPLAYER_H5_VERSION":"mobile_v1","ENV":"prod","ROOT_URL":"https:\u002F\u002Fcms-mall.csdn.net\u002F","VUE_APP_API_URL_SERVER":"http:\u002F\u002Fcms-community-api.internal.csdn.net\u002F","VUE_APP_API_URL":"https:\u002F\u002Fcms-api.csdn.net\u002F","LOGIN_URL":"https:\u002F\u002Fpassport.csdn.net\u002Faccount\u002Flogin","VUE_APP_DOMAIN_SKILL":"https:\u002F\u002Fedu.csdn.net\u002F","VUE_APP_DOMAIN_PATH":"https:\u002F\u002Fedu.csdn.net\u002F","VUE_APP_COMMUNITY_API_URL":"https:\u002F\u002Fcommunity-api.csdn.net\u002F","VUE_APP_CCLOUD_API_URL":"https:\u002F\u002Fbizapi.csdn.net\u002Fcommunity-cloud\u002Fv1\u002F","VUE_APP_SKILL_API_URL":"https:\u002F\u002Fbizapi.csdn.net\u002Fskilltree\u002Fapi\u002F","VUE_APP_SEARCH_PLUGIN_API_URL":"https:\u002F\u002Fbizapi.csdn.net\u002Fsearchplugin\u002F","VUE_APP_COMMUNITY_ASK_API_URL":"https:\u002F\u002Fmp-ask.csdn.net\u002F","VUE_APP_ME_URL":"https:\u002F\u002Fme.csdn.net\u002F","VUE_APP_CCLOUD_RESUME":"https:\u002F\u002Fbizapi.csdn.net\u002Fjob-api\u002F","VUE_APP_CCLOUD_MAIN":"https:\u002F\u002Fwww.csdn.net\u002F","VUE_APP_CCLOUD_UC":"https:\u002F\u002Fwww.csdn.net\u002F","VUE_APP_CCLOUD_BZP_API_URL":"https:\u002F\u002Fbizapi.csdn.net\u002F","VUE_APP_CCLOUD_START_API_URL":"https:\u002F\u002Fmp-action.csdn.net\u002F","VUE_APP_PRACTIVE":"https:\u002F\u002Fbizapi.csdn.net\u002Fdaily-practice\u002F","VUE_APP_CCLOUD_HOSTPATH":"https:\u002F\u002Fbbs.csdn.net\u002F"},"queries":{"pageId":[],"domain":["ccloud.csdn.net\u002Fccloud\u002Fdetail1"],"id":["177807"],"deviceType":"pc","isSpider":"","hostname":["bbs.csdn.net"]},"basePath":"bbs.csdn.net\u002Fccloud\u002Ftopics\u002F177807","hrefUrl":"https:\u002F\u002Fbbs.csdn.net\u002Ftopics\u002F177807","active":0,"navBarFixed":false,"title":"用C写CGI怎么能输出header等这些信息？","isLive":false,"contentType":{"text":"text","picture":"picture","link":"link","video":"video","vote":"vote","live":"live","blog":"blog","long_text":"long_text","task_text":"task_text"},"liveUrl":"https:\u002F\u002Flive.csdn.net\u002Froom\u002Fiframe\u002F","spmExtra":{"id":127,"topicId":177807},"keywords":"","description":"以下内容是CSDN社区关于用C写CGI怎么能输出header等这些信息？相关内容，如果想了解更多关于VC\u002FMFC社区其他内容，请访问CSDN社区。"};</script><script type="text/javascript" src="https://csdnimg.cn/release/cmsfe/public/js/runtime.3e5c09eb.js"></script><script type="text/javascript" src="https://csdnimg.cn/release/cmsfe/public/js/chunk/common.7672e502.js"></script><script type="text/javascript" src="https://csdnimg.cn/release/cmsfe/public/js/chunk/tpl/ccloud-detail/index.243a94d0.js"></script></BODY></HTML>部分<em>信息</em> <br>virtual void CHttpServer::WriteTitle( CHttpServerContext* pCtxt ) const;<em>输出</em><TITLE>部分信息

此外我们可以在命令处理函数中利用CHttpServerContext指针来得到CGI中的相关环境变量，在CHttpServerContext中有一个成员变量m_pECB为下面的结构指针。

typedef struct _EXTENSION_CONTROL_BLOCK {
DWORD cbSize; //IN 该结构长度
DWORD dwVersion //IN 版本
HCONN ConnID; //IN 连接上下文
DWORD dwHttpStatusCode; //OUT 状态码
CHAR lpszLogData[HSE_LOG_BUFFER_LEN]; //OUT
LPSTR lpszMethod; //IN 环境变量REQUEST_METHOD
LPSTR lpszQueryString; //IN QUERY_STRING
LPSTR lpszPathInfo; //IN PATH_INFO
LPSTR lpszPathTranslated; //IN PATH_TRANSLATED
DWORD cbTotalBytes; //IN CONTENT_LENGTH
DWORD cbAvailable; //IN
LPBYTE lpbData; //IN
LPSTR lpszContentType; //IN CONTENT_TYPE
...其他信息在此忽略
} EXTENSION_CONTROL_BLOCK, *LPEXTENSION_CONTROL_BLOCK;
……
……4.1 为什么需要多进程/线程



Nikto安全扫描工具
Nikto是一款Web安全扫描工具，可以扫描指定主机的web类型，主机名，特定目录，cookie，特定CGI漏洞，XSS漏洞，SQL注入漏洞等，非常强大滴说。。。 root@91ri.org:~# cd /pentest/web/nikto/ root@91ri.org:/pentest/web/nikto# ls docs nikto.conf nikto.pl plugins templates root@91ri.org:/pentest/web/nikto# ./nikto.pl -h Option host requires an argument -config+ Use this config file -Cgidirs+ scan these CGI dirs: ‘none’, ‘all’, or values like “/cgi/ /cgi-a/” -dbcheck check database and other key files for syntax errors -Display+ Turn on/off display outputs -evasion+ ids evasion technique -Format+ save file (-o) format -host+ target host -Help Extended help information -id+ Host authentication to use, format is id:pass or id:pass:realm -list-plugins List all available plugins -mutate+ Guess additional file names -mutate-options+ Provide extra information for mutations -output+ Write output to this file -nocache Disables the URI cache -nossl Disables using SSL -no404 Disables 404 checks -port+ Port to use (default 80) -Plugins+ List of plugins to run (default: ALL) -root+ Prepend root value to all requests, format is /directory -ssl Force ssl mode on port -Single Single request mode -timeout+ Timeout (default 2 seconds) -Tuning+ Scan tuning -update Update databases and plugins from CIRT.net -vhost+ Virtual host (for Host header) -Version Print plugin and database versions + requires a value Note: This is the short help output. Use -H for full help. 升级插件 root@91ri.org:/pentest/web/nikto# ./nikto.pl -update -h 指定扫描的目标 –p 端口 root@91ri.org:/pentest/web/nikto# ./nikto.pl -h www.91ri.org -p 80 -C 指定CGI目录 –all表示猜解CGI目录 root@91ri.org:/pentest/web/nikto# ./nikto.pl -h www.91ri.org -C all -T选项包含很多小选项 –T 9表示扫描SQL注入漏洞 root@91ri.org:/pentest/web/nikto# ./nikto.pl -h www.91ri.org -T 9 -D指定输出显示 2显示cookies root@91ri.org:/pentest/web/nikto# ./nikto.pl -h www.91ri.org -D 2 -T选项包含的小选项解释： 0 检查文件上传页面 1 检查web日志 2 检查错误配置或默认文件 3检查信息泄露问题 4 检查XSS/Script/HTML问题 5 从根目录检查是否存在可访问的文件 6 检查拒绝服务问题 7 从任意文件检索是否存在可访问文件 8 检查是否存在系统命令执行漏洞 9 检查SQL注入漏洞 a 检查认证绕过问题 b 识别安装的软件版本 c 检查源代码泄露问题 x 反向链接选项
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