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  1. Moodle
  2. MDL-30741

html_to_text is pathologically slow with certain input involving <pre>

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    • MOODLE_20_STABLE, MOODLE_21_STABLE, MOODLE_22_STABLE, MOODLE_23_STABLE
    • MOODLE_20_STABLE, MOODLE_21_STABLE, MOODLE_22_STABLE
    • MDL-30741_master
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      1. Place the attached script into the root of your Moodle site
      2. Run the attached script via a web browser
      3. The output should be:
        • without the patched code – the page will run for however long your PHP timeout is set to, and then display the conversion result for the first string and the second string without a converted result
        • with the patches code – the page will load and both strings will be converted from their HTML format into text and displayed on the page very quickly
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      Place the attached script into the root of your Moodle site Run the attached script via a web browser The output should be: without the patched code – the page will run for however long your PHP timeout is set to, and then display the conversion result for the first string and the second string without a converted result with the patches code – the page will load and both strings will be converted from their HTML format into text and displayed on the page very quickly

      The following string value from a quiz question was causing the convert_pre() method in _/lib/html2text.php to get stuck and never finish converting the string to a text representation:

      Consider the following function:<br /><pre style="color: rgb(153, 51, 102);">void FillMeUp(char* in_string) {<br />  int i = 0;<br />  while (in_string[i] != '\0') {<br />    in_string[i] = 'X';<br />    i++;<br />  }<br />}</pre>What would happen if a non-terminated string were input to this function?<br /><br />

        1. test.php
          1 kB
          Justin Filip

            jfilip Justin Filip (Inactive)
            jfilip Justin Filip (Inactive)
            Tim Hunt Tim Hunt
            Eloy Lafuente (stronk7) Eloy Lafuente (stronk7)
            Ankit Agarwal Ankit Agarwal
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              Created:
              Updated:
              Resolved:

                Error rendering 'clockify-timesheets-time-tracking-reports:timer-sidebar'. Please contact your Jira administrators.