commit ab8e081f3007f45e98171e163f080fea8caad964 Author: Kathy Brade brade@pearlcrescent.com Date: Tue Aug 29 15:55:21 2017 -0400

Bug 22232: gather info on use of bootstrap status messages --- README-BOOTSTRAP | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 68 insertions(+)

diff --git a/README-BOOTSTRAP b/README-BOOTSTRAP new file mode 100644 index 0000000..8bc2a76 --- /dev/null +++ b/README-BOOTSTRAP @@ -0,0 +1,68 @@ +HOW TOR LAUNCHER USES BOOTSTRAP STATUS MESSAGES + +(This information was originally recorded in +https://trac.torproject.org/projects/tor/ticket/22232) + +To start monitoring events, Tor Launcher issues the following Tor +control port command: + SETEVENTS STATUS_CLIENT NOTICE WARN ERR +Tor Launcher then looks for 650 responses. + +When one of the following responses is received, it is logged to +the browser console and added to an in-memory log buffer (which is +used to implement "Copy Tor Log To Clipboard"): + WARN, ERR, DEBUG, INFO, NOTICE + +Tor Launcher also issues a GETINFO status/bootstrap-phase command +soon after the control port connection has been established. + +When a STATUS_CLIENT message is received, Tor Launcher uses the +info contained within the message to detect bootstrap errors and +to show progress. The GETINFO status/bootstrap-phase response is +used for this same purpose (both kinds of response messages are +parsed and processed by the same code). + +Tor Launcher maintains two important pieces of internal state +information about the bootstrap process: + +mIsBootstrapDone (Boolean) This is set to true when a STATUS_CLIENT + BOOTSTRAP event with PROGRESS=100 is received. It is set to false + when any other STATUS_CLIENT BOOTSTRAP event is received. + +mBootstrapErrorOccurred (Boolean) This is set to true when a + STATUS_CLIENT BOOTSTRAP event with a severity of WARN or ERR, and + RECOMMENDATION of warn is received. It is set to false when + mIsBootstrapDone is set to true as well as after the user makes + changes to their settings (after a SAVECONF is done). + +The PROGRESS field of the STATUS_CLIENT messages are used directly +to display the completion percentage (progress bar). + +The TAG= keywords within the STATUS_CLIENT messages are used for +two purposes: + +1. The values are mapped to localized strings and displayed in the +progress window. If Tor Launcher cannot map the TAG to a localized +string, it displays the SUMMARY text instead (otherwise, the SUMMARY +field is not used). + +2. The TAG value along with REASON is used to suppress repeated +errors. When Tor Launcher sets mBootstrapErrorOccurred to true (see +above), an error is shown to the user unless the previous error +displayed had the same TAG and REASON values. + +The "Copy Tor Log To Clipboard" button is displayed with the warning +icon when Tor Launcher detects a bootstrap error (see +mBootstrapErrorOccurred above) or when it receives a log message +event with severity of WARN or ERR. + +The severity value within a STATUS_CLIENT BOOTSTRAP event is used +to detect bootstrap errors (as described above) and also to determine +the level for local logging. + +When displaying errors, Tor Launcher tries to map the REASON values +to localized strings. If this fails, the WARNING text is displayed +instead. HOSTADDR is appended to the error text when it is present. + +RECOMMENDATION is part of the information that is used to determine +if a bootstrap error has occurred (as described above).