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use abiword with abicommand under unix, spawn abiword processes under windows

pull/75/head
Peter 'Pita' Martischka 2011-08-04 13:35:42 +01:00
parent e8d84b6058
commit 53242d4660
1 changed files with 105 additions and 27 deletions
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132
node/utils/Abiword.js
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@ -20,21 +20,63 @@
var util = require('util');
var spawn = require('child_process').spawn;
var async = require("async");
var settings = require("./Settings");
var os = require('os');
var stdoutBuffer = "";
function doConvertTask(task, callback)
//on windows we have to spawn a process for each convertion, cause the plugin abicommand doesn't exist on this platform
if(os.type().indexOf("Windows") > -1)
{
//span an abiword process to perform the conversion
var abiword = spawn(settings.abiword, ["--to=" + task.destFile, task.srcFile]);
//delegate the processing of stdout to another function
abiword.stdout.on('data', function (data)
var stdoutBuffer = "";
function doConvertTask(task, callback)
{
//add data to buffer
stdoutBuffer+=data.toString();
});
//span an abiword process to perform the conversion
var abiword = spawn(settings.abiword, ["--to=" + task.destFile, task.srcFile]);
//delegate the processing of stdout to another function
abiword.stdout.on('data', function (data)
{
//add data to buffer
stdoutBuffer+=data.toString();
});
//append error messages to the buffer
abiword.stderr.on('data', function (data)
{
stdoutBuffer += data.toString();
});
//throw exceptions if abiword is dieing
abiword.on('exit', function (code)
{
if(code != 0) {
throw "Abiword died with exit code " + code;
}
if(stdoutBuffer != "")
{
console.log(stdoutBuffer);
}
callback();
});
}
exports.convertFile = function(srcFile, destFile, type, callback)
{
doConvertTask({"srcFile": srcFile, "destFile": destFile, "type": type}, callback);
};
}
//on unix operating systems, we can start abiword with abicommand and communicate with it via stdin/stdout
//thats much faster, about factor 10
else
{
//Queue with the converts we have to do
var queue = async.queue(doConvertTask, 1);
//spawn the abiword process
var abiword = spawn(settings.abiword, ["--plugin", "AbiCommand"]);
//append error messages to the buffer
abiword.stderr.on('data', function (data)
@ -43,22 +85,58 @@ function doConvertTask(task, callback)
});
//throw exceptions if abiword is dieing
abiword.on('exit', function (code)
abiword.on('exit', function (code)
{
if(code != 0) {
throw "Abiword died with exit code " + code;
}
if(stdoutBuffer != "")
{
console.log(stdoutBuffer);
}
callback();
throw "Abiword died with exit code " + code;
});
}
exports.convertFile = function(srcFile, destFile, type, callback)
{
doConvertTask({"srcFile": srcFile, "destFile": destFile, "type": type}, callback);
};
//delegate the processing of stdout to a other function
abiword.stdout.on('data',onAbiwordStdout);
var stdoutCallback = null;
var stdoutBuffer = "";
var firstPrompt = true;
function onAbiwordStdout(data)
{
//add data to buffer
stdoutBuffer+=data.toString();
//we're searching for the prompt, cause this means everything we need is in the buffer
if(stdoutBuffer.search("AbiWord:>") != -1)
{
//filter the feedback message
var err = stdoutBuffer.search("OK") != -1 ? null : stdoutBuffer;
//reset the buffer
stdoutBuffer = "";
//call the callback with the error message
//skip the first prompt
if(stdoutCallback != null && !firstPrompt)
{
stdoutCallback(err);
stdoutCallback = null;
}
firstPrompt = false;
}
}
function doConvertTask(task, callback)
{
abiword.stdin.write("convert " + task.srcFile + " " + task.destFile + " " + task.type + "\n");
//create a callback that calls the task callback and the caller callback
stdoutCallback = function (err)
{
callback();
task.callback(err);
};
}
exports.convertFile = function(srcFile, destFile, type, callback)
{
queue.push({"srcFile": srcFile, "destFile": destFile, "type": type, "callback": callback});
};
}