337 lines
8.8 KiB
JavaScript
337 lines
8.8 KiB
JavaScript
var crypto = require('crypto');
|
|
var step = require('step');
|
|
var fs = require('fs');
|
|
var _ = require('underscore');
|
|
var PSQL = require('cartodb-psql');
|
|
var spawn = require('child_process').spawn;
|
|
var assert = require('assert');
|
|
|
|
// Keeps track of what's waiting baking for export
|
|
var bakingExports = {};
|
|
|
|
function OgrFormat(id) {
|
|
this.id = id;
|
|
}
|
|
|
|
OgrFormat.prototype = {
|
|
|
|
id: "ogr",
|
|
|
|
is_file: true,
|
|
|
|
getQuery: function(/*sql, options*/) {
|
|
return null; // dont execute the query
|
|
},
|
|
|
|
transform: function(/*result, options, callback*/) {
|
|
throw "should not be called for file formats";
|
|
},
|
|
|
|
getContentType: function(){ return this._contentType; },
|
|
|
|
getFileExtension: function(){ return this._fileExtension; },
|
|
|
|
getKey: function(options) {
|
|
return [this.id,
|
|
options.dbopts.dbname,
|
|
options.dbopts.user,
|
|
options.gn,
|
|
this.generateMD5(options.filename),
|
|
this.generateMD5(options.sql)].concat(options.skipfields).join(':');
|
|
},
|
|
|
|
generateMD5: function (data){
|
|
var hash = crypto.createHash('md5');
|
|
hash.update(data);
|
|
return hash.digest('hex');
|
|
}
|
|
|
|
};
|
|
|
|
// Internal function usable by all OGR-driven outputs
|
|
OgrFormat.prototype.toOGR = function(options, out_format, out_filename, callback) {
|
|
|
|
//var gcol = options.gn;
|
|
var sql = options.sql;
|
|
var skipfields = options.skipfields;
|
|
var out_layername = options.filename;
|
|
|
|
var dbopts = options.dbopts;
|
|
|
|
var ogr2ogr = global.settings.ogr2ogrCommand || 'ogr2ogr';
|
|
var dbhost = dbopts.host;
|
|
var dbport = dbopts.port;
|
|
var dbuser = dbopts.user;
|
|
var dbpass = dbopts.pass;
|
|
var dbname = dbopts.dbname;
|
|
|
|
var that = this;
|
|
|
|
var columns = [];
|
|
var geocol;
|
|
var pg;
|
|
|
|
// Drop ending semicolon (ogr doens't like it)
|
|
sql = sql.replace(/;\s*$/, '');
|
|
|
|
step (
|
|
|
|
function fetchColumns() {
|
|
var colsql = 'SELECT * FROM (' + sql + ') as _cartodbsqlapi LIMIT 0';
|
|
pg = new PSQL(dbopts);
|
|
pg.query(colsql, this);
|
|
},
|
|
// jshint maxcomplexity:9
|
|
function findSRS(err, result) {
|
|
assert.ifError(err);
|
|
|
|
//if ( ! result.rows.length ) throw new Error("Query returns no rows");
|
|
|
|
var needSRS = that._needSRS;
|
|
|
|
// Skip system columns, find geom column
|
|
for (var i=0; i<result.fields.length; ++i) {
|
|
var field = result.fields[i];
|
|
var k = field.name;
|
|
if ( skipfields.indexOf(k) !== -1 ) {
|
|
continue;
|
|
}
|
|
if ( out_format !== 'CSV' && k === "the_geom_webmercator" ) {
|
|
continue;
|
|
} // TODO: drop ?
|
|
if ( out_format === 'CSV' ) {
|
|
columns.push(pg.quoteIdentifier(k)+'::text');
|
|
} else {
|
|
columns.push(pg.quoteIdentifier(k));
|
|
}
|
|
|
|
if ( needSRS ) {
|
|
if ( ! geocol && pg.typeName(field.dataTypeID) === 'geometry' ) {
|
|
geocol = k;
|
|
}
|
|
}
|
|
}
|
|
//console.log(columns.join(','));
|
|
|
|
if ( ! needSRS || ! geocol ) {
|
|
return null;
|
|
}
|
|
|
|
var next = this;
|
|
|
|
var qgeocol = pg.quoteIdentifier(geocol);
|
|
var sridsql = 'SELECT ST_Srid(' + qgeocol + ') as srid, GeometryType(' +
|
|
qgeocol + ') as type FROM (' + sql + ') as _cartodbsqlapi WHERE ' +
|
|
qgeocol + ' is not null limit 1';
|
|
|
|
pg.query(sridsql, function(err, result) {
|
|
if ( err ) { next(err); return; }
|
|
if ( result.rows.length ) {
|
|
var srid = result.rows[0].srid;
|
|
var type = result.rows[0].type;
|
|
next(null, srid, type);
|
|
}
|
|
});
|
|
|
|
},
|
|
function spawnDumper(err, srid, type) {
|
|
assert.ifError(err);
|
|
|
|
var next = this;
|
|
|
|
var ogrsql = 'SELECT ' + columns.join(',') + ' FROM (' + sql + ') as _cartodbsqlapi';
|
|
|
|
var tables = 'fake';
|
|
if (options.affectedTables && options.affectedTables.length) {
|
|
tables = options.affectedTables.join(',');
|
|
}
|
|
|
|
var ogrargs = [
|
|
'-f', out_format,
|
|
'-lco', 'ENCODING=UTF-8',
|
|
'-lco', 'LINEFORMAT=CRLF',
|
|
out_filename,
|
|
"PG:host=" + dbhost + " port=" + dbport + " user=" + dbuser + " dbname=" + dbname + " password=" + dbpass,
|
|
'tables=' + tables,
|
|
'-sql', ogrsql
|
|
];
|
|
|
|
if ( srid ) {
|
|
ogrargs.push('-a_srs', 'EPSG:'+srid);
|
|
}
|
|
|
|
if ( type ) {
|
|
ogrargs.push('-nlt', type);
|
|
}
|
|
|
|
if (options.cmd_params){
|
|
ogrargs.concat(options.cmd_params);
|
|
}
|
|
|
|
ogrargs.push('-nln', out_layername);
|
|
|
|
var child = spawn(ogr2ogr, ogrargs);
|
|
|
|
/*
|
|
console.log('ogr2ogr ' + _.map(ogrargs, function(x) { return "'" + x + "'"; }).join(' '));
|
|
*/
|
|
|
|
var stdout = '';
|
|
child.stdout.on('data', function(data) {
|
|
stdout += data;
|
|
//console.log('stdout: ' + data);
|
|
});
|
|
|
|
var stderr;
|
|
var logErrPat = new RegExp(/^ERROR/);
|
|
child.stderr.on('data', function(data) {
|
|
data = data.toString(); // know of a faster way ?
|
|
// Store only the first ERROR line
|
|
if ( ! stderr && data.match(logErrPat) ) {
|
|
stderr = data;
|
|
}
|
|
console.log('ogr2ogr stderr: ' + data);
|
|
});
|
|
|
|
child.on('exit', function(code) {
|
|
if ( code ) {
|
|
console.log("ogr2ogr exited with code " + code);
|
|
var emsg = stderr ? stderr.split('\n')[0] : ( "unknown ogr2ogr error (code " + code + ")" );
|
|
// TODO: add more info about this error ?
|
|
//if ( RegExp(/attempt to write non-.*geometry.*to.*type shapefile/i).exec(emsg) )
|
|
next(new Error(emsg));
|
|
} else {
|
|
next(null);
|
|
}
|
|
});
|
|
},
|
|
function finish(err) {
|
|
callback(err, out_filename);
|
|
}
|
|
);
|
|
};
|
|
|
|
OgrFormat.prototype.toOGR_SingleFile = function(options, fmt, callback) {
|
|
|
|
var dbname = options.dbopts.dbname;
|
|
var user_id = options.dbopts.user;
|
|
var gcol = options.gcol;
|
|
var sql = options.sql;
|
|
var skipfields = options.skipfields;
|
|
var ext = this._fileExtension;
|
|
var layername = options.filename;
|
|
|
|
var tmpdir = global.settings.tmpDir || '/tmp';
|
|
var reqKey = [
|
|
fmt,
|
|
dbname,
|
|
user_id,
|
|
gcol,
|
|
this.generateMD5(layername),
|
|
this.generateMD5(sql)
|
|
].concat(skipfields).join(':');
|
|
var outdirpath = tmpdir + '/sqlapi-' + process.pid + '-' + reqKey;
|
|
var dumpfile = outdirpath + ':cartodb-query.' + ext;
|
|
|
|
// TODO: following tests:
|
|
// - fetch query with no "the_geom" column
|
|
this.toOGR(options, fmt, dumpfile, callback);
|
|
};
|
|
|
|
OgrFormat.prototype.sendResponse = function(opts, callback) {
|
|
//var next = callback;
|
|
var reqKey = this.getKey(opts);
|
|
var qElem = new ExportRequest(opts.sink, callback, opts.beforeSink);
|
|
var baking = bakingExports[reqKey];
|
|
if ( baking ) {
|
|
baking.req.push( qElem );
|
|
} else {
|
|
baking = bakingExports[reqKey] = { req: [ qElem ] };
|
|
this.generate(opts, function(err, dumpfile) {
|
|
if ( opts.profiler ) {
|
|
opts.profiler.done('generate');
|
|
}
|
|
step (
|
|
function sendResults() {
|
|
var nextPipe = function(finish) {
|
|
var r = baking.req.shift();
|
|
if ( ! r ) { finish(null); return; }
|
|
r.sendFile(err, dumpfile, function() {
|
|
nextPipe(finish);
|
|
});
|
|
};
|
|
|
|
if ( ! err ) {
|
|
nextPipe(this);
|
|
} else {
|
|
_.each(baking.req, function(r) {
|
|
r.cb(err);
|
|
});
|
|
return true;
|
|
}
|
|
},
|
|
function cleanup(/*err*/) {
|
|
delete bakingExports[reqKey];
|
|
|
|
// unlink dump file (sync to avoid race condition)
|
|
console.log("removing", dumpfile);
|
|
try { fs.unlinkSync(dumpfile); }
|
|
catch (e) {
|
|
if ( e.code !== 'ENOENT' ) {
|
|
console.log("Could not unlink dumpfile " + dumpfile + ": " + e);
|
|
}
|
|
}
|
|
}
|
|
);
|
|
});
|
|
}
|
|
};
|
|
|
|
// TODO: put in an ExportRequest.js ----- {
|
|
|
|
function ExportRequest(ostream, callback, beforeSink) {
|
|
this.cb = callback;
|
|
this.beforeSink = beforeSink;
|
|
this.ostream = ostream;
|
|
this.istream = null;
|
|
this.canceled = false;
|
|
|
|
var that = this;
|
|
|
|
this.ostream.on('close', function() {
|
|
//console.log("Request close event, qElem.stream is " + qElem.stream);
|
|
that.canceled = true;
|
|
if ( that.istream ) {
|
|
that.istream.destroy();
|
|
}
|
|
});
|
|
}
|
|
|
|
ExportRequest.prototype.sendFile = function (err, filename, callback) {
|
|
var that = this;
|
|
if ( ! this.canceled ) {
|
|
//console.log("Creating readable stream out of dumpfile");
|
|
this.istream = fs.createReadStream(filename)
|
|
.on('open', function(/*fd*/) {
|
|
if ( that.beforeSink ) {
|
|
that.beforeSink();
|
|
}
|
|
that.istream.pipe(that.ostream);
|
|
callback();
|
|
})
|
|
.on('error', function(e) {
|
|
console.log("Can't send response: " + e);
|
|
that.ostream.end();
|
|
callback();
|
|
});
|
|
} else {
|
|
//console.log("Response was canceled, not streaming the file");
|
|
callback();
|
|
}
|
|
this.cb();
|
|
};
|
|
|
|
//------ }
|
|
|
|
module.exports = OgrFormat;
|