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- //: Listmgr2.cpp
- //////////////////////////////////////////////////
- // Copyright (c) Bruce Eckel, 1998
- // Source code file from the book "Thinking in Java"
- // All rights reserved EXCEPT as allowed by the
- // following statements: You can freely use this file
- // for your own work (personal or commercial),
- // including modifications and distribution in
- // executable form only. Permission is granted to use
- // this file in classroom situations, including its
- // use in presentation materials, as long as the book
- // "Thinking in Java" is cited as the source.
- // Except in classroom situations, you cannot copy
- // and distribute this code; instead, the sole
- // distribution point is http://www.BruceEckel.com
- // (and official mirror sites) where it is
- // freely available. You cannot remove this
- // copyright and notice. You cannot distribute
- // modified versions of the source code in this
- // package. You cannot use this file in printed
- // media without the express permission of the
- // author. Bruce Eckel makes no representation about
- // the suitability of this software for any purpose.
- // It is provided "as is" without express or implied
- // warranty of any kind, including any implied
- // warranty of merchantability, fitness for a
- // particular purpose or non-infringement. The entire
- // risk as to the quality and performance of the
- // software is with you. Bruce Eckel and the
- // publisher shall not be liable for any damages
- // suffered by you or any third party as a result of
- // using or distributing software. In no event will
- // Bruce Eckel or the publisher be liable for any
- // lost revenue, profit, or data, or for direct,
- // indirect, special, consequential, incidental, or
- // punitive damages, however caused and regardless of
- // the theory of liability, arising out of the use of
- // or inability to use software, even if Bruce Eckel
- // and the publisher have been advised of the
- // possibility of such damages. Should the software
- // prove defective, you assume the cost of all
- // necessary servicing, repair, or correction. If you
- // think you've found an error, please email all
- // modified files with clearly commented changes to:
- // Bruce@EckelObjects.com. (Please use the same
- // address for non-code errors found in the book.)
- /////////////////////////////////////////////////
-
- // CGI version of Listmgr.c in C++, which
- // extracts its input via the GET submission
- // from the associated applet. Also works as
- // an ordinary CGI program with HTML forms.
- #include <stdio.h>
- #include "CGITools.h"
- const char* dataFile = "list2.txt";
- const char* notify = "Bruce@EckelObjects.com";
- #undef DEBUG
-
- // Similar code as before, except that it looks
- // for the email name inside of '<>':
- int inList(FILE* list, const char* emailName) {
- const int BSIZE = 255;
- char lbuf[BSIZE];
- char emname[BSIZE];
- // Put the email name in '<>' so there's no
- // possibility of a match within another name:
- sprintf(emname, "<%s>", emailName);
- // Go to the beginning of the list:
- fseek(list, 0, SEEK_SET);
- // Read each line in the list:
- while(fgets(lbuf, BSIZE, list)) {
- // Strip off the newline:
- char * newline = strchr(lbuf, '\n');
- if(newline != 0)
- *newline = '\0';
- if(strstr(lbuf, emname) != 0)
- return 1;
- }
- return 0;
- }
-
- void main() {
- // You MUST print this out, otherwise the
- // server will not send the response:
- printf("Content-type: text/plain\n\n");
- FILE* list = fopen(dataFile, "a+t");
- if(list == 0) {
- printf("error: could not open database. ");
- printf("Notify %s", notify);
- return;
- }
- // For a CGI "GET," the server puts the data
- // in the environment variable QUERY_STRING:
- CGI_vector query(getenv("QUERY_STRING"));
- #if defined(DEBUG)
- // Test: dump all names and values
- for(int i = 0; i < query.size(); i++) {
- printf("query[%d].name() = [%s], ",
- i, query[i].name());
- printf("query[%d].value() = [%s]\n",
- i, query[i].value());
- }
- #endif(DEBUG)
- Pair name = query[0];
- Pair email = query[1];
- if(name.empty() || email.empty()) {
- printf("error: null name or email");
- return;
- }
- if(inList(list, email.value())) {
- printf("Already in list: %s", email.value());
- return;
- }
- // It's not in the list, add it:
- fseek(list, 0, SEEK_END);
- fprintf(list, "%s <%s>;\n",
- name.value(), email.value());
- fflush(list);
- fclose(list);
- printf("%s <%s> added to list\n",
- name.value(), email.value());
- } ///:~