C++ NOTICES类代码示例

void NOTICES::clear_keep() {
    deque<NOTICE>::iterator i = notices.begin();
    while (i != notices.end()) {
        NOTICE& n = *i;
        n.keep = false;
        i++;
    }
}

// called at the end of client initialization
//
void NOTICES::init_rss() {
    rss_feeds.init();
    if (log_flags.notice_debug) {
        msg_printf(0, MSG_INFO, "read %d total notices", (int)notices.size());
    }

    // sort by decreasing arrival time, then assign seqnos
    //
    sort(notices.begin(), notices.end(), cmp);
    size_t n = notices.size();
    for (unsigned int i=0; i<n; i++) {
        notices[i].seqno = (int)(n - i);
    }
}

// write archive file for the given RSS feed
// (or, if NULL, non-RSS notices)
//
void NOTICES::write_archive(RSS_FEED* rfp) {
    char path[MAXPATHLEN];

    if (rfp) {
        rfp->archive_file_name(path);
    } else {
        safe_strcpy(path, NOTICES_DIR"/archive.xml");
    }
    FILE* f = fopen(path, "w");
    if (!f) return;
    MIOFILE fout;
    fout.init_file(f);
    fout.printf("<notices>\n");
    if (!f) return;
    for (unsigned int i=0; i<notices.size(); i++) {
        NOTICE& n = notices[i];
        if (rfp) {
            if (strcmp(rfp->url, n.feed_url)) continue;
        } else {
            if (strlen(n.feed_url)) continue;
        }
        n.write(fout, false);
    }
    fout.printf("</notices>\n");
    fclose(f);
}

// we're considering adding a notice n.
// If there's already an identical message n2
//     return false (don't add n)
// If there's a message n2 with same title and text,
//      and n is significantly newer than n2,
//      delete n2
//
// Also remove notices older than 30 days
//
bool NOTICES::remove_dups(NOTICE& n) {
    deque<NOTICE>::iterator i = notices.begin();
    bool removed_something = false;
    bool retval = true;
    double min_time = gstate.now - 30*86400;
    while (i != notices.end()) {
        NOTICE& n2 = *i;
        if (n2.arrival_time < min_time
            || (n2.create_time && n2.create_time < min_time)
        ) {
            i = notices.erase(i);
            removed_something = true;
#if 0
        // this check prevents news item edits from showing; skip it
        } else if (same_guid(n, n2)) {
            n2.keep = true;
            return false;
#endif
        } else if (same_text(n, n2)) {
            int min_diff = 0;

            // show a given scheduler notice at most once a week
            //
            if (!strcmp(n.category, "scheduler")) {
                min_diff = 7*86400;
            }

            if (n.create_time > n2.create_time + min_diff) {
                i = notices.erase(i);
                removed_something = true;
            } else {
                n2.keep = true;
                retval = false;
                ++i;
            }
        } else {
            ++i;
        }
    }
#ifndef SIM
    if (removed_something) {
        gstate.gui_rpcs.set_notice_refresh();
    }
#endif
    return retval;
}

// Remove "need network access" notices
//
void NOTICES::remove_network_msg() {
    deque<NOTICE>::iterator i = notices.begin();
    while (i != notices.end()) {
        NOTICE& n = *i;
        if (!strcmp(n.description.c_str(), NEED_NETWORK_MSG)) {
            i = notices.erase(i);
#ifndef SIM
            gstate.gui_rpcs.set_notice_refresh();
#endif
            if (log_flags.notice_debug) {
                msg_printf(0, MSG_INFO, "REMOVING NETWORK MESSAGE");
            }
        } else {
            ++i;
        }
    }
}

void NOTICES::unkeep(const char* url) {
    deque<NOTICE>::iterator i = notices.begin();
    bool removed_something = false;
    while (i != notices.end()) {
        NOTICE& n = *i;
        if (!strcmp(url, n.feed_url) && !n.keep) {
            i = notices.erase(i);
            removed_something = true;
        } else {
            i++;
        }
    }
#ifndef SIM
    if (removed_something) {
        gstate.gui_rpcs.set_notice_refresh();
    }
#endif
}

// called at the start of client initialization
//
void NOTICES::init() {
#if 0
    read_archive_file(NOTICES_DIR"/archive.xml", NULL);
    if (log_flags.notice_debug) {
        msg_printf(0, MSG_INFO, "read %d BOINC notices", (int)notices.size());
    }
    write_archive(NULL);
#endif
}

// Remove scheduler notices from the given project.
// This is called if we did an RPC to the project requesting work,
// and no notices were returned.
//
void NOTICES::remove_scheduler_notices(PROJECT* p) {
    deque<NOTICE>::iterator i = notices.begin();
    while (i != notices.end()) {
        NOTICE& n = *i;
        if (!strcmp(n.project_name, p->get_project_name())
            && !strcmp(n.category, "scheduler")
        ) {
            i = notices.erase(i);
#ifndef SIM
            gstate.gui_rpcs.set_notice_refresh();
#endif
            if (log_flags.notice_debug) {
                msg_printf(0, MSG_INFO, "REMOVING PROJECT MESSAGE");
            }
        } else {
            ++i;
        }
    }
}

// Remove outdated notices
//
void NOTICES::remove_notices(PROJECT* p, int which) {
    deque<NOTICE>::iterator i = notices.begin();
    while (i != notices.end()) {
        NOTICE& n = *i;
        if (p && strcmp(n.project_name, p->get_project_name())) {
            ++i;
            continue;
        }
        bool remove = false;
        switch (which) {
        case REMOVE_NETWORK_MSG:
            remove = !strcmp(n.description.c_str(), NEED_NETWORK_MSG);
            break;
        case REMOVE_SCHEDULER_MSG:
            remove = !strcmp(n.category, "scheduler");
            break;
        case REMOVE_NO_WORK_MSG:
            remove = !strcmp(n.description.c_str(), NO_WORK_MSG);
            break;
        case REMOVE_CONFIG_MSG:
            remove = (strstr(n.description.c_str(), "cc_config.xml") != NULL);
            break;
        case REMOVE_APP_INFO_MSG:
            remove = (strstr(n.description.c_str(), "app_info.xml") != NULL);
            break;
        case REMOVE_APP_CONFIG_MSG:
            remove = (strstr(n.description.c_str(), "app_config.xml") != NULL);
            break;
        }
        if (remove) {
            i = notices.erase(i);
#ifndef SIM
            gstate.gui_rpcs.set_notice_refresh();
#endif
            if (log_flags.notice_debug) {
                msg_printf(p, MSG_INFO, "Removing notices of type %d", which);
            }
        } else {
            ++i;
        }
    }
}

// add a notice.
// 
bool NOTICES::append(NOTICE& n) {
    if (!remove_dups(n)) {
        return false;
    }
    if (notices.empty()) {
        n.seqno = 1;
    } else {
        n.seqno = notices.front().seqno + 1;
    }
    if (log_flags.notice_debug) {
        msg_printf(0, MSG_INFO,
            "[notice] appending notice %d: %s",
            n.seqno, strlen(n.title)?n.title:n.description.c_str()
        );
    }
    notices.push_front(n);
#if 0
    if (!strlen(n.feed_url)) {
        write_archive(NULL);
    }
#endif
    return true;
}

// handle a completed RSS feed fetch
//
void RSS_FEED_OP::handle_reply(int http_op_retval) {
    char filename[256];
    int nitems;

    if (!rfp) return;   // op was canceled

    if (http_op_retval) {
        if (log_flags.notice_debug) {
            msg_printf(0, MSG_INFO,
                "[notice] fetch of %s failed: %d", rfp->url, http_op_retval
            );
        }
        return;
    }

    if (log_flags.notice_debug) {
        msg_printf(0, MSG_INFO,
            "[notice] handling reply from %s", rfp->url
        );
    }

    rfp->feed_file_name(filename);
    FILE* f = fopen(filename, "r");
    if (!f) {
        msg_printf(0, MSG_INTERNAL_ERROR,
            "RSS feed file '%s' not found", filename
        );
        return;
    }
    MIOFILE fin;
    fin.init_file(f);
    XML_PARSER xp(&fin);
    int retval = rfp->parse_items(xp, nitems);
    if (retval) {
        if (log_flags.notice_debug) {
            msg_printf(0, MSG_INFO,
                "[notice] RSS parse error: %d", retval
            );
        }
    }
    fclose(f);

    notices.write_archive(rfp);
}

// parse the actual RSS feed.
//
int RSS_FEED::parse_items(XML_PARSER& xp, int& nitems) {
    nitems = 0;
    int ntotal = 0, nerror = 0;
    int retval, func_ret = ERR_XML_PARSE;
    vector<NOTICE> new_notices;

    notices.clear_keep();

    while (!xp.get_tag()) {
        if (!xp.is_tag) continue;
        if (xp.match_tag("/rss")) {
            if (log_flags.notice_debug) {
                msg_printf(0, MSG_INFO,
                    "[notice] parsed RSS feed: total %d error %d added %d",
                    ntotal, nerror, nitems
                );
            }
            func_ret = 0;
            break;
        }
        if (xp.match_tag("item")) {
            NOTICE n;
            ntotal++;
            retval = n.parse_rss(xp);
            if (retval) {
                nerror++;
            } else if (n.create_time < gstate.now - 30*86400) {
                if (log_flags.notice_debug) {
                    msg_printf(0, MSG_INFO,
                        "[notice] item is older than 30 days: %s",
                        n.title
                    );
                }
            } else {
                n.arrival_time = gstate.now;
                n.keep = true;
                safe_strcpy(n.feed_url, url);
                safe_strcpy(n.project_name, project_name);
                new_notices.push_back(n);
            }
            continue;
        }
        if (xp.parse_int("error_num", retval)) {
            if (log_flags.notice_debug) {
                msg_printf(0,MSG_INFO,
                    "[notice] RSS fetch returned error %d (%s)",
                    retval,
                    boincerror(retval)
                );
            }
            return retval;
        }
    }

    //  sort new notices by increasing create time, and append them
    //
    std::sort(new_notices.begin(), new_notices.end(), create_time_asc);
    for (unsigned int i=0; i<new_notices.size(); i++) {
        NOTICE& n = new_notices[i];
        if (notices.append(n)) {
            nitems++;
        }
    }
    notices.unkeep(url);
    return func_ret;
}