Пример #1
0
  public void testIt() throws ProtocolException, ParseException {
    String urlString;
    Content content;
    Parse parse;
    Configuration conf = NutchConfiguration.create();
    Protocol protocol;
    ProtocolFactory factory = new ProtocolFactory(conf);
    OOParser parser = new OOParser();
    parser.setConf(conf);

    for (int i = 0; i < sampleFiles.length; i++) {
      urlString = "file:" + sampleDir + fileSeparator + sampleFiles[i];

      protocol = factory.getProtocol(urlString);
      content = protocol.getProtocolOutput(new Text(urlString), new CrawlDatum()).getContent();

      parse = parser.getParse(content).get(content.getUrl());

      String text = parse.getText().replaceAll("[ \t\r\n]+", " ");
      assertTrue(expectedText.equals(text));
    }
  }
Пример #2
0
  @SuppressWarnings("fallthrough")
  public void run() {
    activeThreads.incrementAndGet(); // count threads

    FetchItem fit = null;
    try {
      // checking for the server to be running and fetcher.parse to be true
      if (parsing && NutchServer.getInstance().isRunning()) reportToNutchServer = true;

      while (true) {
        // creating FetchNode for storing in FetchNodeDb
        if (reportToNutchServer) this.fetchNode = new FetchNode();
        else this.fetchNode = null;

        // check whether must be stopped
        if (isHalted()) {
          LOG.debug(getName() + " set to halted");
          fit = null;
          return;
        }

        fit = ((FetchItemQueues) fetchQueues).getFetchItem();
        if (fit == null) {
          if (feeder.isAlive() || ((FetchItemQueues) fetchQueues).getTotalSize() > 0) {
            LOG.debug(getName() + " spin-waiting ...");
            // spin-wait.
            ((AtomicInteger) spinWaiting).incrementAndGet();
            try {
              Thread.sleep(500);
            } catch (Exception e) {
            }
            ((AtomicInteger) spinWaiting).decrementAndGet();
            continue;
          } else {
            // all done, finish this thread
            LOG.info("Thread " + getName() + " has no more work available");
            return;
          }
        }
        lastRequestStart.set(System.currentTimeMillis());
        Text reprUrlWritable = (Text) fit.datum.getMetaData().get(Nutch.WRITABLE_REPR_URL_KEY);
        if (reprUrlWritable == null) {
          setReprUrl(fit.url.toString());
        } else {
          setReprUrl(reprUrlWritable.toString());
        }
        try {
          // fetch the page
          redirecting = false;
          redirectCount = 0;
          do {
            if (LOG.isInfoEnabled()) {
              LOG.info(
                  "fetching "
                      + fit.url
                      + " (queue crawl delay="
                      + ((FetchItemQueues) fetchQueues).getFetchItemQueue(fit.queueID).crawlDelay
                      + "ms)");
            }
            if (LOG.isDebugEnabled()) {
              LOG.debug("redirectCount=" + redirectCount);
            }
            redirecting = false;
            Protocol protocol = this.protocolFactory.getProtocol(fit.url.toString());
            BaseRobotRules rules = protocol.getRobotRules(fit.url, fit.datum);
            if (!rules.isAllowed(fit.u.toString())) {
              // unblock
              ((FetchItemQueues) fetchQueues).finishFetchItem(fit, true);
              if (LOG.isDebugEnabled()) {
                LOG.debug("Denied by robots.txt: " + fit.url);
              }
              output(
                  fit.url,
                  fit.datum,
                  null,
                  ProtocolStatus.STATUS_ROBOTS_DENIED,
                  CrawlDatum.STATUS_FETCH_GONE);
              reporter.incrCounter("FetcherStatus", "robots_denied", 1);
              continue;
            }
            if (rules.getCrawlDelay() > 0) {
              if (rules.getCrawlDelay() > maxCrawlDelay && maxCrawlDelay >= 0) {
                // unblock
                ((FetchItemQueues) fetchQueues).finishFetchItem(fit, true);
                LOG.debug(
                    "Crawl-Delay for "
                        + fit.url
                        + " too long ("
                        + rules.getCrawlDelay()
                        + "), skipping");
                output(
                    fit.url,
                    fit.datum,
                    null,
                    ProtocolStatus.STATUS_ROBOTS_DENIED,
                    CrawlDatum.STATUS_FETCH_GONE);
                reporter.incrCounter("FetcherStatus", "robots_denied_maxcrawldelay", 1);
                continue;
              } else {
                FetchItemQueue fiq = ((FetchItemQueues) fetchQueues).getFetchItemQueue(fit.queueID);
                fiq.crawlDelay = rules.getCrawlDelay();
                if (LOG.isDebugEnabled()) {
                  LOG.debug(
                      "Crawl delay for queue: "
                          + fit.queueID
                          + " is set to "
                          + fiq.crawlDelay
                          + " as per robots.txt. url: "
                          + fit.url);
                }
              }
            }
            ProtocolOutput output = protocol.getProtocolOutput(fit.url, fit.datum);
            ProtocolStatus status = output.getStatus();
            Content content = output.getContent();
            ParseStatus pstatus = null;
            // unblock queue
            ((FetchItemQueues) fetchQueues).finishFetchItem(fit);

            String urlString = fit.url.toString();

            // used for FetchNode
            if (fetchNode != null) {
              fetchNode.setStatus(status.getCode());
              fetchNode.setFetchTime(System.currentTimeMillis());
              fetchNode.setUrl(fit.url);
            }

            reporter.incrCounter("FetcherStatus", status.getName(), 1);

            switch (status.getCode()) {
              case ProtocolStatus.WOULDBLOCK:
                // retry ?
                ((FetchItemQueues) fetchQueues).addFetchItem(fit);
                break;

              case ProtocolStatus.SUCCESS: // got a page
                pstatus =
                    output(
                        fit.url,
                        fit.datum,
                        content,
                        status,
                        CrawlDatum.STATUS_FETCH_SUCCESS,
                        fit.outlinkDepth);
                updateStatus(content.getContent().length);
                if (pstatus != null
                    && pstatus.isSuccess()
                    && pstatus.getMinorCode() == ParseStatus.SUCCESS_REDIRECT) {
                  String newUrl = pstatus.getMessage();
                  int refreshTime = Integer.valueOf(pstatus.getArgs()[1]);
                  Text redirUrl =
                      handleRedirect(
                          fit.url,
                          fit.datum,
                          urlString,
                          newUrl,
                          refreshTime < Fetcher.PERM_REFRESH_TIME,
                          Fetcher.CONTENT_REDIR);
                  if (redirUrl != null) {
                    fit = queueRedirect(redirUrl, fit);
                  }
                }
                break;

              case ProtocolStatus.MOVED: // redirect
              case ProtocolStatus.TEMP_MOVED:
                int code;
                boolean temp;
                if (status.getCode() == ProtocolStatus.MOVED) {
                  code = CrawlDatum.STATUS_FETCH_REDIR_PERM;
                  temp = false;
                } else {
                  code = CrawlDatum.STATUS_FETCH_REDIR_TEMP;
                  temp = true;
                }
                output(fit.url, fit.datum, content, status, code);
                String newUrl = status.getMessage();
                Text redirUrl =
                    handleRedirect(
                        fit.url, fit.datum, urlString, newUrl, temp, Fetcher.PROTOCOL_REDIR);
                if (redirUrl != null) {
                  fit = queueRedirect(redirUrl, fit);
                } else {
                  // stop redirecting
                  redirecting = false;
                }
                break;

              case ProtocolStatus.EXCEPTION:
                logError(fit.url, status.getMessage());
                int killedURLs =
                    ((FetchItemQueues) fetchQueues).checkExceptionThreshold(fit.getQueueID());
                if (killedURLs != 0)
                  reporter.incrCounter(
                      "FetcherStatus", "AboveExceptionThresholdInQueue", killedURLs);
                /* FALLTHROUGH */
              case ProtocolStatus.RETRY: // retry
              case ProtocolStatus.BLOCKED:
                output(fit.url, fit.datum, null, status, CrawlDatum.STATUS_FETCH_RETRY);
                break;

              case ProtocolStatus.GONE: // gone
              case ProtocolStatus.NOTFOUND:
              case ProtocolStatus.ACCESS_DENIED:
              case ProtocolStatus.ROBOTS_DENIED:
                output(fit.url, fit.datum, null, status, CrawlDatum.STATUS_FETCH_GONE);
                break;

              case ProtocolStatus.NOTMODIFIED:
                output(fit.url, fit.datum, null, status, CrawlDatum.STATUS_FETCH_NOTMODIFIED);
                break;

              default:
                if (LOG.isWarnEnabled()) {
                  LOG.warn("Unknown ProtocolStatus: " + status.getCode());
                }
                output(fit.url, fit.datum, null, status, CrawlDatum.STATUS_FETCH_RETRY);
            }

            if (redirecting && redirectCount > maxRedirect) {
              ((FetchItemQueues) fetchQueues).finishFetchItem(fit);
              if (LOG.isInfoEnabled()) {
                LOG.info(" - redirect count exceeded " + fit.url);
              }
              output(
                  fit.url,
                  fit.datum,
                  null,
                  ProtocolStatus.STATUS_REDIR_EXCEEDED,
                  CrawlDatum.STATUS_FETCH_GONE);
            }

          } while (redirecting && (redirectCount <= maxRedirect));

        } catch (Throwable t) { // unexpected exception
          // unblock
          ((FetchItemQueues) fetchQueues).finishFetchItem(fit);
          logError(fit.url, StringUtils.stringifyException(t));
          output(
              fit.url,
              fit.datum,
              null,
              ProtocolStatus.STATUS_FAILED,
              CrawlDatum.STATUS_FETCH_RETRY);
        }
      }

    } catch (Throwable e) {
      if (LOG.isErrorEnabled()) {
        LOG.error("fetcher caught:" + e.toString());
      }
    } finally {
      if (fit != null) ((FetchItemQueues) fetchQueues).finishFetchItem(fit);
      activeThreads.decrementAndGet(); // count threads
      LOG.info("-finishing thread " + getName() + ", activeThreads=" + activeThreads);
    }
  }
Пример #3
0
  public int run(String[] args) throws Exception {
    boolean dumpText = false;
    boolean force = false;
    String contentType = null;
    String url = null;

    String usage = "Usage: ParserChecker [-dumpText] [-forceAs mimeType] url";

    if (args.length == 0) {
      LOG.error(usage);
      return (-1);
    }

    for (int i = 0; i < args.length; i++) {
      if (args[i].equals("-forceAs")) {
        force = true;
        contentType = args[++i];
      } else if (args[i].equals("-dumpText")) {
        dumpText = true;
      } else if (i != args.length - 1) {
        LOG.error(usage);
        System.exit(-1);
      } else {
        url = URLUtil.toASCII(args[i]);
      }
    }

    if (LOG.isInfoEnabled()) {
      LOG.info("fetching: " + url);
    }

    ProtocolFactory factory = new ProtocolFactory(conf);
    Protocol protocol = factory.getProtocol(url);
    WebPage page = WebPage.newBuilder().build();

    ProtocolOutput protocolOutput = protocol.getProtocolOutput(url, page);

    if (!protocolOutput.getStatus().isSuccess()) {
      LOG.error(
          "Fetch failed with protocol status: "
              + ProtocolStatusUtils.getName(protocolOutput.getStatus().getCode())
              + ": "
              + ProtocolStatusUtils.getMessage(protocolOutput.getStatus()));
      return (-1);
    }
    Content content = protocolOutput.getContent();

    if (content == null) {
      LOG.error("No content for " + url);
      return (-1);
    }
    page.setBaseUrl(new org.apache.avro.util.Utf8(url));
    page.setContent(ByteBuffer.wrap(content.getContent()));

    if (force) {
      content.setContentType(contentType);
    } else {
      contentType = content.getContentType();
    }

    if (contentType == null) {
      LOG.error("Failed to determine content type!");
      return (-1);
    }

    page.setContentType(new Utf8(contentType));

    if (ParserJob.isTruncated(url, page)) {
      LOG.warn("Content is truncated, parse may fail!");
    }

    Parse parse = new ParseUtil(conf).parse(url, page);

    if (parse == null) {
      LOG.error("Problem with parse - check log");
      return (-1);
    }

    // Calculate the signature
    byte[] signature = SignatureFactory.getSignature(getConf()).calculate(page);

    if (LOG.isInfoEnabled()) {
      LOG.info("parsing: " + url);
      LOG.info("contentType: " + contentType);
      LOG.info("signature: " + StringUtil.toHexString(signature));
    }

    LOG.info("---------\nUrl\n---------------\n");
    System.out.print(url + "\n");
    LOG.info("---------\nMetadata\n---------\n");
    Map<CharSequence, ByteBuffer> metadata = page.getMetadata();
    StringBuffer sb = new StringBuffer();
    if (metadata != null) {
      Iterator<Entry<CharSequence, ByteBuffer>> iterator = metadata.entrySet().iterator();
      while (iterator.hasNext()) {
        Entry<CharSequence, ByteBuffer> entry = iterator.next();
        sb.append(entry.getKey().toString())
            .append(" : \t")
            .append(Bytes.toString(entry.getValue()))
            .append("\n");
      }
      System.out.print(sb.toString());
    }
    LOG.info("---------\nOutlinks\n---------\n");
    sb = new StringBuffer();
    for (Outlink l : parse.getOutlinks()) {
      sb.append("  outlink: ").append(l).append('\n');
    }
    System.out.print(sb.toString());
    if (page.getHeaders() != null) {
      LOG.info("---------\nHeaders\n---------\n");
      Map<CharSequence, CharSequence> headers = page.getHeaders();
      StringBuffer headersb = new StringBuffer();
      if (metadata != null) {
        Iterator<Entry<CharSequence, CharSequence>> iterator = headers.entrySet().iterator();
        while (iterator.hasNext()) {
          Entry<CharSequence, CharSequence> entry = iterator.next();
          headersb
              .append(entry.getKey().toString())
              .append(" : \t")
              .append(entry.getValue())
              .append("\n");
        }
        System.out.print(headersb.toString());
      }
    }
    if (dumpText) {
      LOG.info("---------\nParseText\n---------\n");
      System.out.print(parse.getText());
    }

    return 0;
  }