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| 19 | |
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| 20 | #include "connection.hh" |
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| 21 | #include "lexutils.hh" |
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| 22 | |
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| 23 | #include "../db/db.hh" |
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| 24 | #include "../db/msg.hh" |
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| 25 | #include "../db/user.hh" |
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| 26 | #include "../msg/entity.hh" |
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| 27 | #include "../msg/util.hh" |
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| 28 | |
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| 29 | namespace nntp |
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| 30 | { |
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| 31 | class article : public connection::command |
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| 32 | { |
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| 33 | public: |
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| 34 | enum cmd_type { ARTICLE, HEAD, BODY, STAT }; |
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| 35 | |
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| 36 | article(const char *s, cmd_type cmd) : cmd(cmd) { |
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| 37 | connection::register_command(s, this); |
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| 38 | } |
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| 39 | |
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| 40 | connection::continuation::ptr |
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| 41 | perform(connection::cb, const std::string[], size_t) const; |
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| 42 | |
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| 43 | virtual void write_capability_line(connection::cb c) const { |
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| 44 | if (cmd != ARTICLE) return; |
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| 45 | c.send_line("READER"); |
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| 46 | } |
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| 47 | private: |
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| 48 | const cmd_type cmd; |
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| 49 | }; |
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| 50 | |
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| 51 | connection::continuation::ptr |
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| 52 | article::perform(connection::cb c, const std::string args[], size_t cnt) |
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| 53 | const |
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| 54 | { |
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| 55 | enum { MSGID, NUMBER, NONE } state; |
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| 56 | |
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| 57 | std::string arg; |
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| 58 | switch (cnt) { |
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| 59 | case 0: |
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| 60 | state = NONE; |
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| 61 | break; |
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| 62 | case 1: |
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| 63 | arg = args[0]; |
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| 64 | if (arg[0] == '<') { |
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| 65 | if (arg[arg.length()-1] == '>') { |
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| 66 | state = MSGID; |
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| 67 | break; |
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| 68 | } |
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| 69 | } else if (is_number(arg)) { |
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| 70 | state = NUMBER; |
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| 71 | break; |
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| 72 | } |
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| 73 | |
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| 74 | default: |
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| 75 | c.send_line("501 syntax error"); |
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| 76 | return c.dispatch(); |
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| 77 | } |
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| 78 | |
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| 79 | |
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| 80 | boost::shared_ptr<db::msg> message; |
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| 81 | std::string msgnum = "0"; |
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| 82 | try { |
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| 83 | switch (state) { |
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| 84 | case NUMBER: |
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| 85 | if (c.current_group()) { |
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| 86 | db::group::number n; |
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| 87 | std::istringstream is(arg); |
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| 88 | is >> n; |
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| 89 | message = |
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| 90 | c.current_group()->get_article |
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| 91 | (n); |
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| 92 | msgnum = arg; |
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| 93 | c.current_article() = n; |
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| 94 | } else { |
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| 95 | throw db::no_such_group(); |
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| 96 | } |
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| 97 | break; |
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| 98 | case MSGID: |
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| 99 | message = c.dbase().lookup_msgid(arg); |
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| 100 | break; |
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| 101 | case NONE: |
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| 102 | if (c.current_group()) { |
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| 103 | message = |
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| 104 | c.current_group()->get_article |
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| 105 | (c.current_article()); |
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| 106 | std::ostringstream os; |
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| 107 | os << c.current_article(); |
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| 108 | msgnum = os.str(); |
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| 109 | } else { |
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| 110 | throw db::no_such_group(); |
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| 111 | } |
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| 112 | break; |
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| 113 | } |
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| 114 | } catch (db::no_such_article) { |
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| 115 | switch (state) { |
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| 116 | case NUMBER: |
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| 117 | c.send_line("423 no such article"); |
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| 118 | break; |
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| 119 | case MSGID: |
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| 120 | c.send_line("430 no such article"); |
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| 121 | break; |
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| 122 | case NONE: |
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| 123 | if (c.current_article() == 0) |
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| 124 | c.send_line("420 no such article"); |
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| 125 | else |
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| 126 | c.send_line("423 no such article"); |
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| 127 | break; |
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| 128 | } |
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| 129 | return c.dispatch(); |
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| 130 | } catch (db::no_such_group) { |
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| 131 | c.send_line("412 no group selected"); |
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| 132 | return c.dispatch(); |
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| 133 | } |
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| 134 | |
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| 135 | if (!message->reading_authz(c.identity())) |
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| 136 | { |
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| 137 | c.send_line("480 " + message->msgid() + |
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| 138 | " is restricted"); |
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| 139 | return c.dispatch(); |
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| 140 | } |
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| 141 | |
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| 142 | if (message->is_censured()) |
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| 143 | { |
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| 144 | switch (state) { |
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| 145 | case NUMBER: |
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| 146 | c.send_line("423 no such article"); |
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| 147 | break; |
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| 148 | case MSGID: |
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| 149 | c.send_line("430 no such article"); |
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| 150 | break; |
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| 151 | case NONE: |
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| 152 | if (c.current_article() == 0) |
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| 153 | c.send_line("420 no such article"); |
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| 154 | else |
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| 155 | c.send_line("423 no such article"); |
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| 156 | break; |
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| 157 | } |
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| 158 | return c.dispatch(); |
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| 159 | } |
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| 160 | |
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| 161 | std::string msgparm = msgnum + " " + message->msgid(); |
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| 162 | |
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| 163 | if (c.identity() && (cmd == ARTICLE || cmd == BODY)) |
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| 164 | c.identity()->mark_read(message->msgid()); |
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| 165 | |
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| 166 | switch (cmd) { |
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| 167 | case ARTICLE: |
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| 168 | c.send_line("220 " + msgparm + " article follows:"); |
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| 169 | break; |
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| 170 | case HEAD: |
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| 171 | c.send_line("221 " + msgparm + " headers follow:"); |
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| 172 | break; |
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| 173 | case BODY: |
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| 174 | c.send_line("222 " + msgparm + " body follows:"); |
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| 175 | break; |
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| 176 | case STAT: |
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| 177 | c.send_line("223 " + msgparm + " exists"); |
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| 178 | return c.dispatch(); |
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| 179 | } |
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| 180 | |
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| 181 | if (cmd == HEAD || cmd == ARTICLE) |
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| 182 | { |
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| 183 | std::string head = message->get_entity()->get_header(); |
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| 184 | head += message->get_xref_field(true); |
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| 185 | c.send_raw(head.begin(), head.end()); |
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| 186 | } |
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| 187 | if (cmd == ARTICLE) c.send_line(""); |
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| 188 | if (cmd == ARTICLE || cmd == BODY) |
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| 189 | { |
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| 190 | std::string b = msg::dot_stuff |
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| 191 | (message->get_entity()->get_body()); |
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| 192 | c.send_raw(b.begin(), b.end()); |
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| 193 | } |
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| 194 | |
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| 195 | c.send_line("."); |
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| 196 | return c.dispatch(); |
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| 197 | } |
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| 198 | } |
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| 199 | namespace { |
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| 200 | nntp::article article_("article", nntp::article::ARTICLE); |
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| 201 | nntp::article head_("head", nntp::article::HEAD); |
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| 202 | nntp::article body_("body", nntp::article::BODY); |
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| 203 | nntp::article stat_("stat", nntp::article::STAT); |
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| 204 | } |
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