# qDecoder API Reference

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qcgires.c File Reference

## Detailed Description

CGI Response API.

## Functions
bool | qcgires_setcookie (qentry_t *request, const char *name, const char *value, int expire, const char *path, const char *domain, bool secure)
| Set cookie.
bool | qcgires_removecookie (qentry_t *request, const char *name, const char *path, const char *domain, bool secure)
| Remove cookie.
bool | qcgires_setcontenttype (qentry_t *request, const char *mimetype)
| Set responding content-type.
const char * | qcgires_getcontenttype (qentry_t *request)
| Get content-type.
bool | qcgires_redirect (qentry_t *request, const char *uri)
| Send redirection header.
int | qcgires_download (qentry_t *request, const char *filepath, const char *mimetype)
| Force to send(download) file to client in accordance with given mime type.
void | qcgires_error (qentry_t *request, char *format,...)
| Print out HTML error page and exit program.

## Function Documentation

bool qcgires_setcookie | ( | qentry_t * | request,
|  | const char * | name,
|  | const char * | value,
|  | int | expire,
|  | const char * | path,
|  | const char * | domain,
|  | bool | secure
| ) |  |

Set cookie.

Parameters

  request | a pointer of request structure
  name | cookie name
  value | cookie value
  expire | expire related time in seconds (0 means end of session)
  path | cookie path (NULL can current path)
  domain | cookie domain (NULL means current domain)
  secure | secure flag

Returns
  true in case of success, otherwise returns false

// Apply cookie in the current domain and directory for 1 day.
qcgires_setcookie(req, "NAME", "VALUE", 86400, NULL, NULL, false);
// Apply cookie to the "/" directory of "*.qdecoder.org" until the
// browser is closed.
qcgires_setcookie(req, name, value, 0, "/", ".qdecoder.org", false);
// As for the followings, cookies will be set up only when security
// requirements are satisfied.
qcgires_setcookie(req, name, value, 0, NULL, NULL, true);

bool qcgires_removecookie | ( | qentry_t * | request,
|  | const char * | name,
|  | const char * | path,
|  | const char * | domain,
|  | bool | secure
| ) |  |

Remove cookie.

Parameters

  request | a pointer of request structure
  name | cookie name
  path | cookie path
  domain | cookie domain
  secure | secure flag

Returns
  true in case of success, otherwise returns false

qcgires_setcookie(req, "NAME", "VALUE", 0, NULL, NULL, NULL);
qcgires_removecookie(req, "NAME", NULL, NULL, NULL);
qcgires_setcookie(req, "NAME", "VALUE", 0, "/", "www.qdecoder.org", NULL);
qcgires_removecookie(req, "NAME", "/", "www.qdecoder.org", NULL);

bool qcgires_setcontenttype | ( | qentry_t * | request,
|  | const char * | mimetype
| ) |  |

Set responding content-type.

Parameters

  request | a pointer of request structure
  mimetype | mimetype

Returns
  true in case of success, otherwise returns false

qcgires_setcontenttype(req, "text/html");

const char* qcgires_getcontenttype | ( | qentry_t * | request | ) |

Get content-type.

Parameters

  request | a pointer of request structure

Returns
  a pointer of mimetype string in case of success, otherwise returns NULL

qcgires_setcontenttype(req, "text/html");

bool qcgires_redirect | ( | qentry_t * | request,
|  | const char * | uri
| ) |  |

Send redirection header.

Parameters

  request | a pointer of request structure
  uri | new URI

Returns
  true in case of success, otherwise returns false

qcgires_redirect(req, "http://www.qdecoder.org/");

int qcgires_download | ( | qentry_t * | request,
|  | const char * | filepath,
|  | const char * | mimetype
| ) |  |

Force to send(download) file to client in accordance with given mime type.

Parameters

  request | a pointer of request structure
  filepath | file to send
  mimetype | mimetype. NULL can be used for "application/octet-stream".

Returns
  the number of bytes sent. otherwise(file not found) returns -1.

Note
  Do not call qcgires_getcontenttype() before. The results of this function are the same as those acquired when the corresponding files are directly linked to the Web. But this is especially useful in preprocessing files to be downloaded only with user certification and in enabling downloading those files, which cannot be opend on the Web, only through specific programs.

void qcgires_error | ( | qentry_t * | request,
|  | char * | format,
|  |  | ...
| ) |  |

Print out HTML error page and exit program.

Parameters

  request | a pointer of request structure
  format | error message

Returns
  none

qcgires_error(req, "Error: can't find userid.");