1. The Fast Common Gateway Interface 1

Advantages of FastCGI 1

Long-lived Applications 1

Separating Application and Server 2

FastCGI "Roles" 2

Writing FastCGI Applications 4

Code Structure 5

Initial Environment Variables 5

Per-Request Environment Variables 6

Building FastCGI Applications in C 6

Building FastCGI Applications in Perl 7

Building FastCGI Applications in Tcl 7

Implementation Details 7

The fcgi_stdio Library: I/O Compatibility 9

The fcgi_stdio Library: Binary compatibility 10

2. Developing FastCGI Applications in C 11

The I/O Libraries 11

Code Structure 12

Example 1: TinyFastCGI 12

Example 2: Prime Number Generator 13

Building 15

Memory Leaks 16

3. Developing FastCGI Applications in Perl 17

Getting Started 17

Example: TinyFastCGI 18

4. Developing FastCGI Applications in Tcl 19

Getting Started 19

Example: TinyFastCGI 20

A. FastCGI Reference Pages 21

FCGI_Accept (3) 21

Name 21

Synopsis 21

Description 21

Return Values 22

FCGI_StartFilterData (3) 22

Name 22

Synopsis 22

Description 23

Return Values 23

Example 23

FCGI_SetExitStatus(3) 24

Name 24

Synopsis 24

Description 24