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75 lines
3.4 KiB
C
75 lines
3.4 KiB
C
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/*
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* Copyright (c) 2019, Salvatore Sanfilippo <antirez at gmail dot com>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Redis nor the names of its contributors may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "server.h"
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/* Emit an item in Gopher directory listing format:
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* <type><descr><TAB><selector><TAB><hostname><TAB><port>
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* If descr or selector are NULL, then the "(NULL)" string is used instead. */
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void addReplyGopherItem(client *c, const char *type, const char *descr,
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const char *selector, const char *hostname, int port)
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{
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sds item = sdscatfmt(sdsempty(),"%s%s\t%s\t%s\t%i\r\n",
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type, descr,
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selector ? selector : "(NULL)",
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hostname ? hostname : "(NULL)",
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port);
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addReplyProto(c,item,sdslen(item));
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sdsfree(item);
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}
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/* This is called by processInputBuffer() when an inline request is processed
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* with Gopher mode enabled, and the request happens to have zero or just one
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* argument. In such case we get the relevant key and reply using the Gopher
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* protocol. */
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void processGopherRequest(client *c) {
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robj *keyname = c->argc == 0 ? createStringObject("/",1) : c->argv[1];
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robj *o = lookupKeyRead(c->db,keyname);
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/* If there is no such key, return with a Gopher error. */
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if (o == NULL || o->type != OBJ_STRING) {
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char *errstr;
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if (o == NULL)
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errstr = "Error: no content at the specified key";
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else
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errstr = "Error: selected key type is invalid "
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"for Gopher output";
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addReplyGopherItem(c,"i",errstr,NULL,NULL,0);
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addReplyGopherItem(c,"i","Redis Gopher server",NULL,NULL,0);
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} else {
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}
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/* Cleanup, also make sure to emit the final ".CRLF" line. Note that
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* the connection will be closed immediately after this because the client
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* will be flagged with CLIENT_CLOSE_AFTER_REPLY, in accordance with the
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* Gopher protocol. */
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if (c->argc == 0) decrRefCount(keyname);
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addReplyProto(c,".\r\n",3);
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}
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