Cannot reference local files

[gausie]

Despite the documentation, you cannot reference local files - only file URLs to be accessed via binaryAjax.

[calvinmetcalf]

can you link to where in the documentation it implies this (couldn't find it)

[gausie]

Erm the readme uses non-URL filenames

[calvinmetcalf]

They can be relative urls...

On Sat, Dec 13, 2014, 11:26 AM Samuel Gaus notifications@github.com wrote:

Erm the readme uses non-URL filenames

— Reply to this email directly or view it on GitHub https://github.com/calvinmetcalf/shapefile-js/issues/35#issuecomment-66881734 .

[nmccready]

@calvinmetcalf can u please do an example, I tried local file protocol . outcome: [Error: Protocol:file: not supported.] }

[nmccready]

Your readme kinda implies that it supports local files by stating

shp("files/pandr.zip").then(function(geojson){
        //see bellow for whats here this internally call shp.parseZip()
    });

When in reality I think your referring to your hosted projects path. Which is looking for the file on port 80. It would be nice to pass straight buffers or streams as well.

[calvinmetcalf]

yeah you probably can't use it with a file url, if you need to test it locally use something like serve

[Monk-Data]

You can easily use local files, no need to serve them up over http:

var shp = require('shpjs');
var fs = require('fs');

var fnZip = function() {
    shp(fs.readFileSync('N:\\TIGER2015\\COUNTY\\tl_2015_us_county.zip')).then(function(geo) {
        console.log('success');
        console.log(geo);
    }).catch(function() {
        console.log('error')
        console.log(arguments);
    });
};

var fnParts = function() {
    var obj = shp.combine([
        shp.parseShp(fs.readFileSync('N:\\TIGER2015\\COUNTY\\tl_2015_us_county.shp'), fs.readFileSync('N:\\TIGER2015\\COUNTY\\tl_2015_us_county.prj', 'utf8')),
        shp.parseDbf(fs.readFileSync('N:\\TIGER2015\\COUNTY\\tl_2015_us_county.dbf'))]);
    console.log(obj);
};

fnZip();
fnParts();

[craiggoldstone]

You can use local files, without serving them over HTTP, by using the a file browser.

<input type="file" id="input" onchange="handleFiles(this.files)">

var fr = new FileReader();
fr.onload = function () {
  shp(this.result).then(function(geojson) {
    console.log('loaded geojson:', geojson);
  })
};
fr.readAsArrayBuffer(file);

[calvinmetcalf]

closing this, the tl;dr is that if you use relative file paths but then open the html as a file, things will break, so don't do that

[loganpowell]

Sorry for asking on a closed issue, but - though the readFileSync solution posed by @Monk-Data works - I'm trying to use the async readFile function without any luck. I'm about to convert over a thousand Census shapefiles to geojson, so I can't tie up the thread to use the synchronous version. Any pointers?

[loganpowell]

Also, perhaps related, would it be possible to allow a callback strategy in addition to promise?

[loganpowell]

I figured it out. Sorry for the newb question!

[hoogw]

Your readme kinda implies that it supports local files by stating

shp("files/pandr.zip").then(function(geojson){
        //see bellow for whats here this internally call shp.parseZip()
    });

When in reality I think your referring to your hosted projects path. Which is looking for the file on port 80. It would be nice to pass straight buffers or streams as well.

I initially think the other way, I think it means local file path, in fact, it means url file path. Can you put a note in readme, explain it is a URL resource file path, NOT a local file path.

when read local file, you have to read it into arraybuffer at first place, then, use shp(arraybuffer) to import in