📄 mod_imagemap.c
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rid of it otherwise */ } } /* by this point, value does not start with '..' */ if (value && *value) { return apr_pstrcat(r->pool, my_base, value, NULL); } return my_base;}static int imap_reply(request_rec *r, char *redirect){ if (!strcasecmp(redirect, "error")) { /* they actually requested an error! */ return HTTP_INTERNAL_SERVER_ERROR; } if (!strcasecmp(redirect, "nocontent")) { /* tell the client to keep the page it has */ return HTTP_NO_CONTENT; } if (redirect && *redirect) { /* must be a URL, so redirect to it */ apr_table_setn(r->headers_out, "Location", redirect); return HTTP_MOVED_TEMPORARILY; } return HTTP_INTERNAL_SERVER_ERROR;}static void menu_header(request_rec *r, char *menu){ ap_set_content_type(r, "text/html; charset=ISO-8859-1"); ap_rvputs(r, DOCTYPE_HTML_3_2, "<html><head>\n<title>Menu for ", ap_escape_html(r->pool, r->uri), "</title>\n</head><body>\n", NULL); if (!strcasecmp(menu, "formatted")) { ap_rvputs(r, "<h1>Menu for ", ap_escape_html(r->pool, r->uri), "</h1>\n<hr />\n\n", NULL); } return;}static void menu_blank(request_rec *r, char *menu){ if (!strcasecmp(menu, "formatted")) { ap_rputs("\n", r); } if (!strcasecmp(menu, "semiformatted")) { ap_rputs("<br />\n", r); } if (!strcasecmp(menu, "unformatted")) { ap_rputs("\n", r); } return;}static void menu_comment(request_rec *r, char *menu, char *comment){ if (!strcasecmp(menu, "formatted")) { ap_rputs("\n", r); /* print just a newline if 'formatted' */ } if (!strcasecmp(menu, "semiformatted") && *comment) { ap_rvputs(r, comment, "\n", NULL); } if (!strcasecmp(menu, "unformatted") && *comment) { ap_rvputs(r, comment, "\n", NULL); } return; /* comments are ignored in the 'formatted' form */}static void menu_default(request_rec *r, char *menu, char *href, char *text){ if (!strcasecmp(href, "error") || !strcasecmp(href, "nocontent")) { return; /* don't print such lines, these aren't really href's */ } if (!strcasecmp(menu, "formatted")) { ap_rvputs(r, "<pre>(Default) <a href=\"", href, "\">", text, "</a></pre>\n", NULL); } if (!strcasecmp(menu, "semiformatted")) { ap_rvputs(r, "<pre>(Default) <a href=\"", href, "\">", text, "</a></pre>\n", NULL); } if (!strcasecmp(menu, "unformatted")) { ap_rvputs(r, "<a href=\"", href, "\">", text, "</a>", NULL); } return;}static void menu_directive(request_rec *r, char *menu, char *href, char *text){ if (!strcasecmp(href, "error") || !strcasecmp(href, "nocontent")) { return; /* don't print such lines, as this isn't really an href */ } if (!strcasecmp(menu, "formatted")) { ap_rvputs(r, "<pre> <a href=\"", href, "\">", text, "</a></pre>\n", NULL); } if (!strcasecmp(menu, "semiformatted")) { ap_rvputs(r, "<pre> <a href=\"", href, "\">", text, "</a></pre>\n", NULL); } if (!strcasecmp(menu, "unformatted")) { ap_rvputs(r, "<a href=\"", href, "\">", text, "</a>", NULL); } return;}static void menu_footer(request_rec *r){ ap_rputs("\n\n</body>\n</html>\n", r); /* finish the menu */}static int imap_handler_internal(request_rec *r){ char input[MAX_STRING_LEN]; char *directive; char *value; char *href_text; char *base; char *redirect; char *mapdflt; char *closest = NULL; double closest_yet = -1; apr_status_t status; double testpoint[2]; double pointarray[MAXVERTS + 1][2]; int vertex; char *string_pos; int showmenu = 0; imap_conf_rec *icr; char *imap_menu; char *imap_default; char *imap_base; ap_configfile_t *imap; icr = ap_get_module_config(r->per_dir_config, &imagemap_module); imap_menu = icr->imap_menu ? icr->imap_menu : IMAP_MENU_DEFAULT; imap_default = icr->imap_default ? icr->imap_default : IMAP_DEFAULT_DEFAULT; imap_base = icr->imap_base ? icr->imap_base : IMAP_BASE_DEFAULT; status = ap_pcfg_openfile(&imap, r->pool, r->filename); if (status != APR_SUCCESS) { return HTTP_NOT_FOUND; } base = imap_url(r, NULL, imap_base); /* set base according to default */ if (!base) { return HTTP_INTERNAL_SERVER_ERROR; } mapdflt = imap_url(r, NULL, imap_default); /* and default to global default */ if (!mapdflt) { return HTTP_INTERNAL_SERVER_ERROR; } testpoint[X] = get_x_coord(r->args); testpoint[Y] = get_y_coord(r->args); if ((testpoint[X] == -1 || testpoint[Y] == -1) || (testpoint[X] == 0 && testpoint[Y] == 0)) { /* if either is -1 or if both are zero (new Lynx) */ /* we don't have valid coordinates */ testpoint[X] = -1; testpoint[Y] = -1; if (strncasecmp(imap_menu, "none", 2)) { showmenu = 1; /* show the menu _unless_ ImapMenu is 'none' or 'no' */ } } if (showmenu) { /* send start of imagemap menu if we're going to */ menu_header(r, imap_menu); } while (!ap_cfg_getline(input, sizeof(input), imap)) { if (!input[0]) { if (showmenu) { menu_blank(r, imap_menu); } continue; } if (input[0] == '#') { if (showmenu) { menu_comment(r, imap_menu, input + 1); } continue; } /* blank lines and comments are ignored if we aren't printing a menu */ /* find the first two space delimited fields, recall that * ap_cfg_getline has removed leading/trailing whitespace. * * note that we're tokenizing as we go... if we were to use the * ap_getword() class of functions we would end up allocating extra * memory for every line of the map file */ string_pos = input; if (!*string_pos) { /* need at least two fields */ goto need_2_fields; } directive = string_pos; while (*string_pos && !apr_isspace(*string_pos)) { /* past directive */ ++string_pos; } if (!*string_pos) { /* need at least two fields */ goto need_2_fields; } *string_pos++ = '\0'; if (!*string_pos) { /* need at least two fields */ goto need_2_fields; } while(*string_pos && apr_isspace(*string_pos)) { /* past whitespace */ ++string_pos; } value = string_pos; while (*string_pos && !apr_isspace(*string_pos)) { /* past value */ ++string_pos; } if (apr_isspace(*string_pos)) { *string_pos++ = '\0'; } else { /* end of input, don't advance past it */ *string_pos = '\0'; } if (!strncasecmp(directive, "base", 4)) { /* base, base_uri */ base = imap_url(r, NULL, value); if (!base) { goto menu_bail; } continue; /* base is never printed to a menu */ } read_quoted(&string_pos, &href_text); if (!strcasecmp(directive, "default")) { /* default */ mapdflt = imap_url(r, NULL, value); if (!mapdflt) { goto menu_bail; } if (showmenu) { /* print the default if there's a menu */ redirect = imap_url(r, base, mapdflt); if (!redirect) { goto menu_bail; } menu_default(r, imap_menu, redirect, href_text ? href_text : mapdflt); } continue; } vertex = 0; while (vertex < MAXVERTS && sscanf(string_pos, "%lf%*[, ]%lf", &pointarray[vertex][X], &pointarray[vertex][Y]) == 2) { /* Now skip what we just read... we can't use ANSIism %n */ while (apr_isspace(*string_pos)) { /* past whitespace */ string_pos++; } while (apr_isdigit(*string_pos)) { /* and the 1st number */ string_pos++; } string_pos++; /* skip the ',' */ while (apr_isspace(*string_pos)) { /* past any more whitespace */ string_pos++; } while (apr_isdigit(*string_pos)) { /* 2nd number */ string_pos++; } vertex++; } /* so long as there are more vertices to read, and we have room, read them in. We start where we left off of the last sscanf, not at the beginning. */ pointarray[vertex][X] = -1; /* signals the end of vertices */ if (showmenu) { if (!href_text) { read_quoted(&string_pos, &href_text); /* href text could be here instead */ } redirect = imap_url(r, base, value); if (!redirect) { goto menu_bail; } menu_directive(r, imap_menu, redirect, href_text ? href_text : value); continue; } /* note that we don't make it past here if we are making a menu */ if (testpoint[X] == -1 || pointarray[0][X] == -1) { continue; /* don't try the following tests if testpoints are invalid, or if there are no coordinates */ } if (!strcasecmp(directive, "poly")) { /* poly */ if (pointinpoly(testpoint, pointarray)) { ap_cfg_closefile(imap); redirect = imap_url(r, base, value); if (!redirect) { return HTTP_INTERNAL_SERVER_ERROR; } return (imap_reply(r, redirect)); } continue; } if (!strcasecmp(directive, "circle")) { /* circle */ if (pointincircle(testpoint, pointarray)) { ap_cfg_closefile(imap); redirect = imap_url(r, base, value); if (!redirect) { return HTTP_INTERNAL_SERVER_ERROR; } return (imap_reply(r, redirect)); } continue; } if (!strcasecmp(directive, "rect")) { /* rect */ if (pointinrect(testpoint, pointarray)) { ap_cfg_closefile(imap); redirect = imap_url(r, base, value); if (!redirect) { return HTTP_INTERNAL_SERVER_ERROR; } return (imap_reply(r, redirect)); } continue; } if (!strcasecmp(directive, "point")) { /* point */ if (is_closer(testpoint, pointarray, &closest_yet)) { closest = apr_pstrdup(r->pool, value); } continue; } /* move on to next line whether it's closest or not */ } /* nothing matched, so we get another line! */ ap_cfg_closefile(imap); /* we are done with the map file; close it */ if (showmenu) { menu_footer(r); /* finish the menu and we are done */ return OK; } if (closest) { /* if a 'point' directive has been seen */ redirect = imap_url(r, base, closest); if (!redirect) { return HTTP_INTERNAL_SERVER_ERROR; } return (imap_reply(r, redirect)); } if (mapdflt) { /* a default should be defined, even if only 'nocontent' */ redirect = imap_url(r, base, mapdflt); if (!redirect) { return HTTP_INTERNAL_SERVER_ERROR; } return (imap_reply(r, redirect)); } return HTTP_INTERNAL_SERVER_ERROR; /* If we make it this far, we failed. They lose! */need_2_fields: ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, "map file %s, line %d syntax error: requires at " "least two fields", r->uri, imap->line_number); /* fall through */menu_bail: ap_cfg_closefile(imap); if (showmenu) { /* There's not much else we can do ... we've already sent the headers * to the client. */ ap_rputs("\n\n[an internal server error occured]\n", r); menu_footer(r); return OK; } return HTTP_INTERNAL_SERVER_ERROR;}static int imap_handler(request_rec *r){ /* Optimization: skip the allocation of large local variables on the * stack (in imap_handler_internal()) on requests that aren't using * imagemaps */ if (r->method_number != M_GET || (strcmp(r->handler,IMAP_MAGIC_TYPE) && strcmp(r->handler, "imap-file"))) { return DECLINED; } else { return imap_handler_internal(r); }}static void register_hooks(apr_pool_t *p){ ap_hook_handler(imap_handler,NULL,NULL,APR_HOOK_MIDDLE);}module AP_MODULE_DECLARE_DATA imagemap_module ={ STANDARD20_MODULE_STUFF, create_imap_dir_config, /* dir config creater */ merge_imap_dir_configs, /* dir merger --- default is to override */ NULL, /* server config */ NULL, /* merge server config */ imap_cmds, /* command apr_table_t */ register_hooks /* register hooks */};⌨️ 快捷键说明
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