| /** @file |
| |
| Routines to construct and manipulate message bodies and format error responses |
| |
| @section license License |
| |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| */ |
| |
| #include "ink_unused.h" /* MAGIC_EDITING_TAG */ |
| #include "HttpMessageBody.h" |
| #include "HttpConfig.h" |
| #include "HttpAssert.h" |
| |
| /** This routine returns a constant string name for the status_code. */ |
| const char * |
| HttpMessageBody::StatusCodeName(HTTPStatus status_code) |
| { |
| return http_hdr_reason_lookup(status_code); |
| } |
| |
| /** |
| This routine creates an HTTP error message body for the status code and |
| printf format string format and args va, allocates a response buffer |
| (using malloc), and places the result body in the buffer. The body |
| will be NUL terminated. |
| |
| The caller must free() the returned object when done. |
| |
| The reason string allows you to override the default reason phrase for |
| the status code. If it is NULL, the default is used. If format is NULL |
| or "", no additional text is added. |
| |
| NULL is returned if the resulting length exceeds max_buffer_length. |
| |
| */ |
| char * |
| HttpMessageBody::MakeErrorBodyVA(int max_buffer_length, |
| int *resulting_buffer_length, |
| const HttpConfigParams * config, |
| HTTPStatus status_code, char *reason, char *format, va_list va) |
| { |
| char *p, *outbuf = NULL; |
| char error_title[128]; |
| int pass, l, output_length; |
| |
| if (reason == NULL) |
| reason = (char *) (StatusCodeName(status_code)); |
| |
| output_length = 0; |
| *resulting_buffer_length = 0; |
| |
| for (pass = 1; pass <= 2; pass++) { |
| if (pass == 2) { |
| if (outbuf) |
| xfree(outbuf); |
| if (output_length > max_buffer_length) |
| return (NULL); |
| else |
| outbuf = (char *) xmalloc(output_length); |
| } |
| |
| l = 0; |
| p = outbuf; |
| |
| error_title[sizeof(error_title) - 1] = '\0'; |
| strncpy(error_title, reason, sizeof(error_title) - 1); |
| |
| p = (pass == 1 ? (char *) NULL : &(outbuf[l])); |
| l += ink_bsprintf(p, "<HEAD><TITLE>%s</TITLE></HEAD>\n", error_title) - 1; |
| |
| p = (pass == 1 ? (char *) NULL : &(outbuf[l])); |
| l += ink_bsprintf(p, "<BODY BGCOLOR=\"white\" FGCOLOR=\"black\">") - 1; |
| |
| p = (pass == 1 ? (char *) NULL : &(outbuf[l])); |
| //l += ink_bsprintf(p,"<H1>%s</H1><HR>\n",error_title) - 1; |
| l += ink_bsprintf(p, "\n") - 1; |
| |
| p = (pass == 1 ? (char *) NULL : &(outbuf[l])); |
| l += ink_bsprintf(p, "<FONT FACE=\"Helvetica,Arial\"><B>\n") - 1; |
| |
| if (format && *format) { |
| p = (pass == 1 ? (char *) NULL : &(outbuf[l])); |
| //l += ink_bsprintf(p,"Description: ") - 1; |
| l += ink_bsprintf(p, " ") - 1; |
| |
| p = (pass == 1 ? (char *) NULL : &(outbuf[l])); |
| l += ink_bvsprintf(p, format, va) - 1; |
| } |
| |
| p = (pass == 1 ? (char *) NULL : &(outbuf[l])); |
| l += ink_bsprintf(p, "</B></FONT>\n") - 1; |
| |
| p = (pass == 1 ? (char *) NULL : &(outbuf[l])); |
| //l += ink_bsprintf(p,"<HR>\n") - 1; |
| l += ink_bsprintf(p, "\n") - 1; |
| |
| // Moved trailing info into a comment |
| p = (pass == 1 ? (char *) NULL : &(outbuf[l])); |
| l += ink_bsprintf(p, "<!-- default \"%s\" response (%d) -->\n", reason, status_code) - 1; |
| |
| p = (pass == 1 ? (char *) NULL : &(outbuf[l])); |
| l += ink_bsprintf(p, "</BODY>\n") - 1; |
| |
| l++; // leave room for trailing NUL |
| |
| if (pass == 2) { |
| HTTP_ASSERT(l == output_length); |
| } |
| output_length = l; |
| } |
| |
| *resulting_buffer_length = output_length; |
| return (outbuf); |
| } |
