Ns_UrlToFile(3)

NAME
Ns_SetUrlToFileProc, Ns_UrlIsDir, Ns_UrlIsFile, Ns_UrlToFile - URL to file mapping procedures

SYNOPSIS
#include "ns.h"

void
Ns_SetUrlToFileProc(char *server, Ns_UrlToFileProc *procPtr)

int
Ns_UrlIsDir(char *server, char *url)

int
Ns_UrlIsFile(char *server, char *url)

int
Ns_UrlToFile(Ns_DString *dsPtr, char *server, char *url)

DESCRIPTION

These functions map URL paths to real files and directories. They are normally used to determine whether a given URL has a corresponding file or directory and to return the real filesystem path that corresponds to the URL.

Ns_SetUrlToFileProc(server, procPtr)
    Set a pointer to a custom routine to use in place of Ns_UrlToFile.

Ns_UrlIsDir(server, url)
    Construct a directory name by appending the URL to the current AOLserver pages directory for the specified server. Return NS_TRUE if the directory exists; NS_FALSE otherwise.

Ns_UrlIsFile(server, url)
    Construct a file name by appending the URL to the current AOLserver pages directory for the specified server. Return NS_TRUE if the file exists and is a regular file; NS_FALSE otherwise. Example: /* IsFile - Simple request to determine if an URL is a file. */ int IsFile(Ns_Conn *conn, void *ctx) {
        int isfile;
        char *server;
        server = Ns_ConnServer(conn);
        isfile = Ns_UrlIsFile(server, conn->request->url);
        if (isfile) {
            Ns_ConnReturnNotice(conn, 200, "File", NULL);
        } else {
            Ns_ConnReturnNotice(conn, 200, "Not a File", NULL);
        }
        return NS_OK; }

Ns_UrlToFile(dsPtr, server, url)
    The Ns_UrlToFile function writes the full path name of the file corresponding to the given URL. The result is appended to the Ns_DString. The function does not check that the file exists or is readable by the AOLserver process. This function returns a status of NS_OK or NS_ERROR. Normally this prepends the pageroot to the URL path. If you have created your own custom routine and used Ns_SetUrlToFileProc to point to it, your routine is called instead. This could be used to create, for example, a module that takes the given URL and maps it to a file in a different way than the default Ns_UrlToFile routine. Example: /* A simple page fetch request function. */ int SimpleFetch(Ns_Conn *conn, void *ctx) {
        Ns_DString ds;
        FILE fp;
        char *server;
        Ns_DStringInit(&ds);
        server = Ns_ConnServer(conn);
        Ns_UrlToFile(&ds, server, conn->request->url);
        fp = fopen(ds.string, "r");
        Ns_ConnSendOpenFp(conn, fp, -1);
        fclose(fp);
        Ns_DStringFree(&ds);
        return NS_OK; }

SEE ALSO
nsd(1), info(n)

KEYWORDS