src/server/daemon/error.c

Tue, 12 Sep 2023 18:08:11 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Tue, 12 Sep 2023 18:08:11 +0200
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parent 477
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permissions
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update uwproj

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2013 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include "error.h"
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30
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31 #include <cx/string.h>
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32 #include "../util/pblock.h"
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33 #include "../util/strbuf.h"
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34
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35 // macro for creating an error string (ucx cxmutstr)
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36 #define ERRMSG(s) { s, sizeof(s)-1 }
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37
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38 static cxmutstr error_400 = ERRMSG("<html><body>bad request</body></html>");
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39 static cxmutstr error_403 = ERRMSG("<html><body>forbidden</body></html>");
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40 static cxmutstr error_404 = ERRMSG("<html><body>not found</body></html>");
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41 static cxmutstr error_500 = ERRMSG("<html><body>server error</body></html>");
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42 static cxmutstr error_503 = ERRMSG("<html><body>service unavailable</body></html>");
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43
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44 static cxmutstr error_std = ERRMSG("<html><body>error</body></html>");
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45
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46 int nsapi_error_request(Session *sn, Request *rq) {
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47 short status = rq->status_num;
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48 cxmutstr msg;
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49 if(status <= 0) {
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50 status = 500;
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51 msg = error_500;
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52 } else if(status < 400) {
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53 msg.ptr = NULL;
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54 msg.length = 0;
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55 } else {
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56 switch(status) {
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57 default: msg = error_std;
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58 case 403: {
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59 msg = error_403;
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60 break;
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61 }
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62 case 404: {
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63 msg = error_404;
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64 break;
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65 }
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66 case 500: {
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67 msg = error_500;
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68 break;
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69 }
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70 }
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71 }
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72
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73 pblock_removekey(pb_key_content_type, rq->srvhdrs);
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74 pblock_removekey(pb_key_content_length, rq->srvhdrs);
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75
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76 pblock_kninsert(pb_key_content_length, msg.length, rq->srvhdrs);
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77 pblock_nvinsert("content-type", "text/html", rq->srvhdrs);
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78 protocol_status(sn, rq, status, NULL);
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79 http_start_response(sn, rq);
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80
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81 if(msg.length > 0) {
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82 net_write(sn->csd, msg.ptr, msg.length);
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83 }
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84
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85 return REQ_PROCEED;
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86 }
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87
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88 void fatal_error(HTTPRequest *req, int status) {
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89 cxmutstr msg = error_500;
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90 char *statusmsg = "Internal Server Error";
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91 switch(status) {
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92 case 400: {
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93 msg = error_400;
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94 statusmsg = "Bad request";
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95 break;
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96 }
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97 case 500: {
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98 msg = error_500;
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99 statusmsg = "Internal Server Error";
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100 break;
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101 }
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102 case 503: {
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103 msg = error_503;
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104 statusmsg = "Service Unavailable";
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105 break;
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106 }
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107 }
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108
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109 char buf[512];
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110 int len = snprintf(buf, 512, "HTTP/1.1 %d %s\r\nServer: webserver\r\nContent-type: text/html\r\nContent-length: %zd\r\n\r\n", status, statusmsg, msg.length);
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111
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112 // set socket blocking
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113 int flags;
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114 if (-1 == (flags = fcntl(req->connection->fd, F_GETFL, 0))) {
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115 flags = 0;
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116 }
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117 if (fcntl(req->connection->fd, F_SETFL, flags & ~O_NONBLOCK) != 0) {
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118 // error
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119 }
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120
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121 req->connection->write(req->connection, buf, len);
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122 req->connection->write(req->connection, msg.ptr, msg.length);
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123 }

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