C ++ CGI library GNU cgicc and Linux

Last Update:2018-12-04 Source: Internet

Author: User

Tags dbx

Developer on Alibaba Coud: Build your first app with APIs, SDKs, and tutorials on the Alibaba Cloud. Read more ＞

[Size = medium] download, installation, configuration:

Download: ftp://ftp.gnu.org/gnu/cgicc/

Unpack: Tar xzf cgicc-X.X.X.tar.gz

Build libraries:

* D cgicc-X.X.X/

*./Configure -- prefix =/usr (default or/OPT. Make sure you have write priviges to the directory .)

If compiling to create a 32 bit library on a 64 bit athelon:

Cxxflags = "-M32" cflags = "-M32" ldflags = "-M32"

If installed in/opt then you will need to include:

O include path defined in the compile statement:-I/opt/include

O link command reference:-L/opt/lib

Or use ld_run_path or/etc/lD. So. conf

I prefer to install into/usr to eliminate the configuration headaches.

* Make install

This will create and install include files, documentation and libraries:

* Libraries:

/Usr/lib/libcgicc.

Libcgicc. La

Libcgicc. So (softlink to libcgicc. so.1.3.0)

Libcgicc. so.1 (softlink to libcgicc. so.1.3.0)

Libcgicc. so.1.3.0

* Include files:/usr/include/cgicc /...

* Documentation:/usr/doc/cgicc-X.X.X/index.html

Also available at http://www.gnu.org/software/cgicc/doc/

Example:

The web page:

Test cgicc form

Value 1:

Value 2:

Value 3: button1 button2

HTML form Source:

<HTML>

<Head> <title> test cgicc form </title>
<Body bgcolor = "# cccccc" text = "#000000">

<H2> test cgicc form </H2>

<P>

<Form method = "Post" Action = "/cgi-bin/testcgi">

Value 1:

<Input type = "text" name = "value1">

<P>

Value 2:

<Select name = "value2">

<Option value = "option1"> Option 1

<Option value = "option2"> Option 2

<Option value = "option3"> Option 3

</SELECT>

<P>

Value 3:

<Input type = "radio" name = "value3" value = "button1" Checked = "checked"> button1

<Input type = "radio" name = "value3" value = "button2"> button2

C ++ CGI Source:

# Include <iostream>

# Include <vector>

# Include <string>

# Include "cgicc/cgidefs. H"

# Include "cgicc/cgicc. H"

# Include "cgicc/httphtmlheader. H"

# Include "cgicc/htmlclasses. H"

# Include <stdio. h>

# Include <stdlib. h>

Using namespace STD;

Using namespace cgicc; // or reference as cgicc: cgicc formdata; below in Object Instantiation.

Int main (INT argc, char ** argv)

{

Try {

Cgicc formdata;

// Send HTTP header: Content-Type: text/html

Cout

// Print: <! Doctype HTML public "-// W3C // dtd html 4.0 // en" "http://www.w3.org/TR/REC-html40/strict.dtd">

Cout

// Print: <HTML lang = "en" dir = "LTR">

Cout <HTML (). Set ("Lang", "en"). Set ("dir", "LTR") <Endl;

// Set up the HTML document

Cout <HTML ()
Cout <
Body (). set ("bgcolor", "# cccccc "). set ("text", "#000000 "). set ("Link", "# 0000ff "). set ("vlink", "#000080 ")
<Endl;

Cout <H1 ("this is a demonstration of the GNU cgicc library") <Endl;

Form_iterator fvalue1 = formdata. getelement ("value1 ");

If (! Fvalue1-> isempty () & fvalue1! = (* Formdata). End ()){

Cout <"value1:" <** fvalue1 <Endl;

}

Else

Cout <"no text entered for value1" <Endl;

Cout <p ();

Form_iterator fvalue2 = formdata. getelement ("value2 ");

If (! Fvalue2-> isempty () & fvalue2! = (* Formdata). End ()){

// Note this is just a different way to access the string class.

// See the yolinux GNU string class tutorial.

Cout <"value2:" <(** fvalue2). c_str () <Endl;

}

Cout <p ();

Form_iterator fvalue3 = formdata. getelement ("value3 ");

If (! Fvalue3-> isempty () & fvalue3! = (* Formdata). End ()){

Cout <"value3:" <** fvalue3 <Endl;

}

Cout <p ();

Form_iterator fvalue4 = formdata. getelement ("value4 ");

If (! Fvalue4-> isempty () & fvalue4! = (* Formdata). End ()){

Cout <"value4:" <** fvalue4 <Endl;

}

// Close the HTML document

Cout <body () <HTML ();

}

Catch (exception & E ){

// Handle any errors here.

Cout <"error !! "<Endl;

}

Return 0; // to avoid Apache errors.

}

Compile:

* Compile and static link: (size: 1063688)

O if installed in/opt/: G ++-O testcgi-I/opt/include testcgi. CPP/opt/lib/libcgicc.

O if installed in/usr/: G ++-O testcgi. CPP/usr/lib/libcgicc.

* Dynamic Link (at run time): (size: 48465)

O if installed in/opt/: G ++-O testcgi-I/opt/include testcgi. cpp-L/opt/lib-lcgicc

O if installed in/usr/: G ++-O testcgi. cpp-lcgicc

Run:

The following paths are for a red hat 7.x installation.

1. Place web page in:/var/www/html/testcgi.html

2. Place CGI in:/var/www/cgi-bin/testcgi

3. Start Apache: Service httpd start

4. Test: http: // localhost/testcgi.html

Debugging:

Debugging a "post" method CGI:

* Print environment for transaction:

Code snipet to include in cgicc CGI program:

// Function declaration

Void dumpenvironment (const cgienvironment & env );

...

Const cgienvironment & Env = CGI. getenvironment ();

Cout <env. getrequestmethod () <Endl;

... Env. getpathinfo ()...

... Env. getpathtranslated ()

Env. getreferrer ()

Env. getcontentlength ()

Env. getpostdata ()

...

Also: ENV. getrequestmethod (), ENV. getpathinfo (),
Env. getpathtranslated (), ENV. getreferrer (), ENV. getcontentlength (),
Env. getpostdata (), ENV. getremotehost (), ENV. getremoteaddr (),
Env. getauthtype (), ENV. getremoteuser (), ENV. getremoteident (),
Env. getcontenttype (), ENV. getaccept (), ENV. getuseragent (),
Env. getserversoftware (), ENV. getservername (), ENV. getgatewayinterface (),
Env. getserverprotocol (), ENV. getserverport (), ENV. usinghttps (),
Env. getredirectrequest (), ENV. getredirecturl (), ENV. getredirectstatus (),
Env. getcookies (), ENV. getquerystring (), ENV. getscriptname ().

* Set environment variables:. debug-env

File: Debug-env

Export http_user_agent = "Mozilla/5.0 (X11; U; Linux x86_64; en-US; RV: 1.7.3) Gecko/20041020"

Export server_port = 80

Export http_host = localhost

Export document_root = "/var/www/html"

Export http_accept_charset = "iso-8859-1, *, UTF-8"

Export script_filename = "/var/www/cgi-bin/env. Sh"

Export request_uri = "/cgi-bin/env. Sh"

Export script_name = "/cgi-bin/program. cgi"

Export http_referrer = "http: // localhost/web-page.html"

Export http_connection = keep-alive ""

Export remote_port = 32984

Export Path = "/sbin:/usr/sbin:/bin:/usr/x11r6/bin"

Export Pwd = "/var/www/cgi-bin"

Export server_admin = "root @ localhost"

Export http_accept_language = en

Export
Http_accept = 'text/XML, application/XML, application/XHTML + XML, text/html; q = 0.9, text/plain; q = 0.8, image/PNG, */*; q = 0.5'

Export remote_addr = '2017. 0.0.1'

Export shlvl = 1

Export SERVER_NAME = localhost

Export server_software = 'apache/2.0.52 (Fedora )'

Export QUERY_STRING =

Export server_addr = '2017. 0.0.1'

Export gateway_interface = 'cgi/123'

Export server_protocol = 'HTTP/1.1'

Export http_accept_encoding = Gzip

Export request_method = post

Export content_length = 47

Export content_type = 'application/X-WWW-form-urlencoded'

Export post_data = 'formval1 = value1 & formval2 = value2 & formval3 = value3'

* Create File for (standard input) stdin: Echo $ post_data> debug-stdin

* Run in DBX:

O dbx program. cgi

O break #### (set breakpoints)

O run <debug-stdin

Or

If not debugging, just run: Echo $ post_data |./program. cgi

Links:

* GNU cgicc Home Page

O cgicc documentation

* Yolinux C ++ tutorials and Info

* More source code examples:

O generic test: Test. cpp

O upload a file: Upload. cpp

O drop a cookie: Cookie. cpp

Http://www.lslnet.com/linux/f/docs1/i34/big5261271.htm

Http://www.yolinux.com/TUTORIALS/LinuxTutorialC++CGI.html

This article is an English version of an article which is originally in the Chinese language on aliyun.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to info-contact@alibabacloud.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

Sales Support

1 on 1 presale consultation

Chat Contact Sales
After-Sales Support

24/7 Technical Support 6 Free Tickets per Quarter Faster Response

Open a Ticket
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

Learn More