mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/Scribunto
synced 2024-11-24 16:25:00 +00:00
da06273ede
* Added error backtrace collection to MWServer:handleCall() * When there is an error on parse, show a short and simple inline error message to the user, which when clicked, expands to a full error with HTML-formatted backtrace. * When an error is encountered during module validation, have the code editor jump directly to the line. Requires r115011. * Expose the code location of most errors to Scribunto, by parsing the standard error message format. * During module validation, abbreviate the error location if the error is in the same module. * Do not execute the module during validation, just parse it. Execution does not really work without an active parse operation in progress. It already caused a fatal error if you called require() from the main chunk, and problems would have become more visible as more parser-related APIs were added. * LuaSandbox does not yet provide backtraces, but this is planned. Change-Id: Id9f6564a41b310792b3fe3ebb527cbf8f8771bd1
143 lines
3.7 KiB
Plaintext
143 lines
3.7 KiB
Plaintext
The Lua standalone engine has a message-based protocol for communicating between
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PHP and Lua.
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Messages start with a 16 byte header. The first 8 bytes are the body length in
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hexadecimal. The second 8 bytes are (length * 2 - 1) also in hexadecimal.
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For messages passed from PHP to Lua, the body is encoded as a Lua expression.
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The expression may reference a table in a variable called "chunks", which
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contains an array of functions.
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Messages passed from Lua to PHP have their body encoded in PHP serialize() format.
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They may include instances of function objects which have an "id" member for
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passing back to Lua as an index in the chunk table.
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The expressions encoded into the message bodies are associative arrays. The "op"
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member of the array gives the operation to be performed by the message.
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Every request message demands exactly one response message in reply. When a
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request message is sent, the responder does not need to send the corresponding
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response message as its next message. It may instead send its own request
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message. In this way, a stack of pending requests can be accumulated. This
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mechanism allows re-entrant and recursive calls.
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All numerically-indexed arrays should start from index 1 unless otherwise
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specified.
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== Request messages sent from PHP to Lua ==
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=== loadString ===
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Load some executable Lua code (a "chunk") and return the resulting function ID.
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Message parameters:
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* op: "loadString"
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* text: The string to load
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* chunkName: The name of the string, for use in error messages
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On success, the response message is:
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* op: "return"
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* values: An array with a single element with the ID in it
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On failure, the response message is:
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* op: "error"
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* value: The error message
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=== call ===
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Call a Lua function.
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Message parameters:
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* op: "call"
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* id: The chunk ID
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* args: The argument array
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On success, the response message is:
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* op: "return"
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* values: All return values as an array
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On failure, the response message is:
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* op: "error"
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* value: The value given to error(), usually an error message
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* trace: A table giving a backtrace of the stack as it was when error() was
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called, in a similar format to the one used by debug.getinfo(). Element 1 of
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the table is the function that called error(), element 2 is the function that
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called that, and so on.
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=== registerLibrary ===
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Register a set of functions in the sandbox environment.
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Message parameters:
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* op: "registerLibrary"
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* name: The global variable name to register. May contain "." characters to
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specify a global variable subtable.
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* functions: An associative array mapping function name to ID
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On success, the response message is:
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* op: "return"
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* values: An empty array
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On failure the response message is:
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* op: "error"
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* value: The error message
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=== getStatus ===
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Get status information about the Lua process.
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Message parameters:
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* op: "getStatus"
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On success, the response message is:
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* op: "return"
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* values: An array with a single element, which is an associative array mapping
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status key to value. The status keys are:
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** pid: The process identifier
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** time: The amount of user and system time spent by the process, measured in clock ticks
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** vsize: The virtual memory size in bytes
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** rss: The resident set size in bytes
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On failure, the response message is:
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* op: "return"
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* values: An empty array
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=== quit ===
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Request graceful shutdown.
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Message parameters:
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* op: "quit"
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No return message will be sent.
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== Request messages sent from Lua to PHP ==
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=== call ===
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Call a PHP function.
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Message parameters:
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* op: "call"
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* id: The function ID given by registerLibrary
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* args: An array giving the function arguments
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On success, the response message is:
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* op: "return"
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* values: All return values as an array
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On failure the response message is:
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* op: "error"
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* value: The error message
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