cgi.docx

1、cgi/* cgi.c */#include #include #include cgivars.h#include htmllib.h#include template.hint main() char *postvars = NULL; /* POST request data repository */ char *getvars = NULL; /* GET request data repository */ int form_method; /* POST = 1, GET = 0 */ form_method = getRequestMethod(); if(form_metho

2、d = POST) getvars = getGETvars(); postvars = getPOSTvars(); else if(form_method = GET) getvars = getGETvars(); htmlHeader(Demo Web Page); htmlBody(); template_page(postvars, form_method); htmlFooter(); cleanUp(form_method, getvars, postvars); fflush(stdout); return(0);/* htmllib.c * HTML common libr

3、ary functions for the CGI programs. */#include #include htmllib.hvoid htmlHeader(char *title) printf(Content-type: text/htmlnn%s, title);void htmlBody() printf();void htmlFooter() printf();void addTitleElement(char *title) printf(%s, title);/* cgivars.c * (C) Copyright 2000, Moreton Bay (). * see HT

4、TP (www.w3.org) and RFC */ #include cgivars.h#include #include #include #include #include #include #include #include #include static voidcatchchild() char buf40; pid_t pid; int status; /*signal(SIGCHLD, catchchild);*/ /* Unneeded */ pid = wait4(-1, &status, WUNTRACED, 0); if (WIFSTOPPED(status) spri

5、ntf(buf, sh %d: Child %d stoppedn, getpid(), pid); else sprintf(buf, sh %d: Child %d diedn, getpid(), pid); /if (intcrlf) / write(STDOUT, n, 1); write(STDOUT, buf, strlen(buf); setenv (NIOSSHELL,buf ,1);int execfile(cmd, bg, fplog) char *cmd; int bg; FILE *fplog; int pid; char *myargvMAXARGS; struct

6、 sigaction act; int j=0; /myargvj+ = strtok (/bin/nios2io wd 80681070 127, ); myargvj+ = strtok (cmd, ); while (jMAXARGS&(myargvj+=strtok(NULL, )!=NULL); if (bg=0) signal(SIGCHLD, SIG_DFL); /* * No magic characters in the expanded command, so do the fork and * exec ourself. If this fails with ENOEXE

7、C, then run the * shell anyway since it might be a shell script. */ if (!(pid = vfork() int ci; /* * We are the child, so run the program. * First close any extra file descriptors we have opened. * be sure not to modify any globals after the vfork ! */ signal(SIGINT, SIG_DFL); signal(SIGQUIT, SIG_DF

8、L); signal(SIGCHLD, SIG_DFL); execvp(myargv0, myargv); printf(%s: %sn, myargv0, (errno = ENOENT) ? Bad command or file name : strerror(errno); fprintf(fplog, %s: %sn, myargv0, (errno = ENOENT) ? Bad command or file name : strerror(errno); _exit(0); if (pid = A ? (hex0 & 0xdf) - A) + 10 : (hex0 - 0);

9、 char_value *= 16; char_value += (hex1 = A ? (hex1 & 0xdf) - A) + 10 : (hex1 - 0); return char_value;/* unescape_url */* RFC */void unescape_url(char *url) int n, k; for(n=0, k=0;urlk;+n, +k) if(urln = urlk) = %) urln = hex2char(&urlk+1); k += 2; urln = 0;/* getRequestMethod * retn: from_method (GET

10、 or POST) on success, * -1 on failure. */int getRequestMethod() char *request_method; int form_method; request_method = getenv(REQUEST_METHOD); if(request_method = NULL) return -1; if (!strcmp(request_method, GET) | !strcmp(request_method, HEAD) ) form_method = GET; else if (!strcmp(request_method,

11、POST) form_method = POST; else /* wtf was it then?! */ return -1; return form_method;/* getGETvars * retn: getvars */char *getGETvars() int i; char *getvars; char *getinput; char *pairlist; int paircount = 0; char *nvpair; char *eqpos; getinput = getenv(QUERY_STRING); if (getinput) getinput = strdup

12、(getinput); /* Change all plusses back to spaces */ for(i=0; getinput & getinputi; i+) if(getinputi = +) getinputi = ; pairlist = (char *) malloc(256*sizeof(char *); paircount = 0; nvpair = getinput ? strtok(getinput, &) : NULL; while (nvpair) pairlistpaircount+= strdup(nvpair); if(!(paircount%256)

13、pairlist = (char *) realloc(pairlist,(paircount+256)*sizeof(char *); nvpair = strtok(NULL, &); pairlistpaircount = 0; getvars = (char *) malloc(paircount*2+1)*sizeof(char *); for (i= 0; ipaircount; i+) if(eqpos=strchr(pairlisti, =) *eqpos = 0; unescape_url(getvarsi*2+1 = strdup(eqpos+1); else unesca

14、pe_url(getvarsi*2+1 = strdup(); unescape_url(getvarsi*2 = strdup(pairlisti); getvarspaircount*2 = 0; for(i=0;pairlisti;i+) free(pairlisti); free(pairlist); if (getinput) free(getinput); return getvars;/* getPOSTvars * retn: postvars */char *getPOSTvars() int i,j,k; int content_length; char *postvars

15、; char *postinput; char *pairlist; int paircount = 0; char *nvpair; char *eqpos; char *content_type; FILE *df; FILE *fplog = fopen(/log.txt,w); if( NULL = fplog ) printf(%s nicht gefunden!n, log.txt); exit (1); content_type = getenv(CONTENT_TYPE); if (!content_type) fprintf(fplog,no Content typen);

16、fclose(fplog); exit (1); /df = fopen(/content.html, w); /fwrite(content_type,1,(int)strlen(content_type),df); /fclose(df); postinput = getenv(CONTENT_LENGTH); if (!postinput) fprintf(fplog,no Content lengthn); fclose(fplog); exit (1); if(!(content_length = atoi(postinput) fprintf(fplog,no Content ty

17、pen); fclose(fplog); exit (1); if(!(postinput = (char *) malloc(content_length+1) fprintf(fplog,no Content typen); fclose(fplog); exit (1); if (!fread(postinput, content_length, 1, stdin) fprintf(fplog,no Content typen); fclose(fplog); exit (1); postinputcontent_length = 0; /df = fopen(/post.html, w

18、); /fwrite(postinput,1,content_length,df); /fclose(df); /fprintf(fplog,wrote post.htmln); char stringToFind=multipart/form-data; boundary=; /for normal html post requests if (NULL = strstr(content_type, stringToFind) for(i=0;postinputi;i+) if(postinputi = +) postinputi = ; pairlist = (char *) malloc

19、(256*sizeof(char *); paircount = 0; nvpair = strtok(postinput, &); while (nvpair) pairlistpaircount+ = strdup(nvpair); if(!(paircount%256) pairlist = (char *) realloc(pairlist, (paircount+256)*sizeof(char *); nvpair = strtok(NULL, &); pairlistpaircount = 0; postvars = (char *) malloc(paircount*2+1)*

20、sizeof(char *); for(i = 0;ipaircount;i+) if(eqpos = strchr(pairlisti, =) *eqpos= 0; unescape_url(postvarsi*2+1 = strdup(eqpos+1); else unescape_url(postvarsi*2+1 = strdup(); unescape_url(postvarsi*2= strdup(pairlisti); postvarspaircount*2 = 0; for(i=0;pairlisti;i+) free(pairlisti); free(pairlist); f

21、ree(postinput); fprintf(fplog,extracted all pairsn); unsigned long ledG=0;/read value unsigned long ledR=0; unsigned long buttons=0; unsigned long switches=0; char lcd117 = ; lcd116=0x00; char lcd217 = ; lcd216=0x00; char sevseg9= 0, 0, 0, 0, 0, 0, 0, 0, 0x00 ; unsigned long seg = 0; int lcd_changed

22、=0; int seg7_changed=0; int ledR_changed=0; int ledG_changed=0; for (i=0; postvarsi; i+= 2) fprintf(fplog,DEBUG: %s = %sn, i, postvarsi, postvarsi+1); if(strstr(postvarsi,LEDR) if (*(postvarsi+4)=1) /ledR &= (10); ledR |= 10; else if (*(postvarsi+4)=2) ledR |= 11; else if (*(postvarsi+4)=3) ledR |=

23、12; else if (*(postvarsi+4)=4) ledR |= 13; else if (*(postvarsi+4)=5) ledR |= 14; else if (*(postvarsi+4)=6) ledR |= 15; else if (*(postvarsi+4)=7) ledR |= 16; else if (*(postvarsi+4)=8) ledR |= 17; else if (*(postvarsi+4)=9) ledR |= 18; else if (*(postvarsi+4)=A) ledR |= 19; else if (*(postvarsi+4)

24、=B) ledR |= 110; else if (*(postvarsi+4)=C) ledR |= 111; else if (*(postvarsi+4)=D) ledR |= 112; else if (*(postvarsi+4)=E) ledR |= 113; else if (*(postvarsi+4)=F) ledR |= 114; else if (*(postvarsi+4)=G) ledR |= 115; else if (*(postvarsi+4)=H) ledR |= 116; else if (*(postvarsi+4)=I) ledR |= 117; ledR_changed=1; fprintf(fplog,DEBUG: %s = %s : LEDR = %08Xn, i, postvarsi, postvarsi+1, ledR); else if(strstr(postvarsi,LEDG) if (*(postvarsi+4)=1) ledG |= 10; else if (*(postvarsi+4)=2) ledG |= 11; else if (*(postvarsi+4)=3) ledG |= 12; else if (*(postvarsi