initial work

Author: pjdufour

.gitignore

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+secret/
+bin/
+*.so
+*.h

.travis.yml

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+sudo: false
+language: go
+
+go:
+  - "1.9"
+  - "1.10"
+  - "1.11"
+  - tip
+
+os:
+  - linux
+  #- osx
+
+matrix:
+  allow_failures:
+    - go: tip
+  fast_finish: true
+
+install:
+  - go get ./...
+  - go get -u github.com/alecthomas/gometalinter
+  - gometalinter --install
+
+script:
+  - scripts/format.sh
+  - scripts/test.sh

AUTHORS

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+go-reader is maintained by Spatial Current, Inc.
+
+Authors:
+
+* Patrick Dufour (pjdufour)

CONTRIBUTING.md

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+# Contributing to go-reader
+
+## Contributor License Agreement
+
+Thank you for your interest in contributing.  You will first need to agree to the license.  Simply post the following paragraph, with "your name" and "your github account" substituted as needed, to the first issue [#1](https://github.com/spatialcurrent/go-reader/issues/1).  Otherwise, you can email us [here](mailto:opensource@spatialcurrent.io?subject=CLA).
+
+I, **< YOUR NAME > (< YOUR GITHUB ACCOUNT >)**, agree to the license terms.  My contributions to this repo are granted to **Spatial Current, Inc.** under a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable license and/or copyright is transferred.
+
+## Versioning
+
+This library is still in alpha (0.x.x), so versioning is not semantic yet.
+
+## Authors
+
+See [AUTHORS](https://github.com/spatialcurrent/go-reader/blob/master/AUTHORS) for a list of contributors.

LICENSE

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+MIT License
+
+Copyright (c) 2018 Spatial Current, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+[![Build Status](https://travis-ci.org/spatialcurrent/go-reader-writer.svg)](https://travis-ci.org/spatialcurrent/go-reader-writer) [![Go Report Card](https://goreportcard.com/badge/spatialcurrent/go-reader-writer)](https://goreportcard.com/report/spatialcurrent/go-reader-writer)  [![GoDoc](https://godoc.org/github.com/spatialcurrent/go-reader-writer?status.svg)](https://godoc.org/github.com/spatialcurrent/go-reader-writer) [![license](http://img.shields.io/badge/license-MIT-red.svg?style=flat)](https://github.com/spatialcurrent/go-reader-writer/blob/master/LICENSE)
+
+# go-reader-writer
+
+# Description
+
+**go-reader-writer** (aka GRW) is a simple library for managing reading/writing of resources.  GRW can read from `bzip2`, `gzip`, `snappy`, and `zip` resources and write to `gzip` and `snappy` resources.
+
+Using cross compilers, this library can also be called by other languages.  This library is cross compiled into a Shared Object file (`*.so`).  The Shared Object file can be called by `C`, `C++`, and `Python` on Linux machines.  See the examples folder for patterns that you can use.  This library is also compiled to pure `JavaScript` using [GopherJS](https://github.com/gopherjs/gopherjs).
+
+# Usage
+
+**CLI**
+
+You can use the command line tool to convert between formats.
+
+```
+Usage: grw [-input_uri INPUT_URI] [-input_compression [bzip2|gzip|snappy|zip|none]] [-output_uri OUTPUT_URI] [-output_compression [bzip2|gzip|snappy|zip|none]] [-verbose] [-version]
+Options:
+  -aws_access_key_id string
+        Defaults to value of environment variable AWS_ACCESS_KEY_ID
+  -aws_default_region string
+        Defaults to value of environment variable AWS_DEFAULT_REGION.
+  -aws_secret_access_key string
+        Defaults to value of environment variable AWS_SECRET_ACCESS_KEY.
+  -aws_session_token string
+        Defaults to value of environment variable AWS_SESSION_TOKEN.
+  -help
+        Print help
+  -input_buffer_size int
+        the input reader buffer size (default 4096)
+  -input_compression string
+        Stream input compression algorithm for nodes, using: bzip2, gzip, snappy, zip, or none.
+  -input_uri string
+        "stdin" or uri to input file (default "stdin")
+  -output_append
+        append output to resource
+  -output_buffer_size int
+        the output writer buffer size (default 4096)
+  -output_compression string
+        Stream input compression algorithm for nodes, using: bzip2, gzip, snappy, zip, or none.
+  -output_uri string
+        "stdout" or uri to output resource (default "stdout")
+  -version
+        Prints version to stdout
+```
+
+**Go**
+
+You can import **go-reader-writer** as a library with:
+
+```go
+import (
+  "github.com/spatialcurrent/go-reader-writer/grw"
+)
+...
+```
+
+See [grw](https://godoc.org/github.com/spatialcurrent/go-reader-writer/grw) in GoDoc for information on how to use Go API.
+
+**JavaScript**
+
+```html
+<html>
+  <head>
+    <script src="https://...grw.js"></script>
+  </head>
+  <body>
+    <script>
+      grw.open(uri, "none", function(text){ ... })
+      ...
+    </script>
+  </body>
+</html>
+```
+
+# Examples:
+
+TBD
+
+# Building
+
+**CLI**
+
+The command line go-reader-wrtier program can be built with the `scripts/build_cli.sh` script.
+
+**JavaScript**
+
+You can compile go-reader-writer to pure JavaScript with the `scripts/build_javascript.sh` script.
+
+**Shared Object**
+
+The `scripts/build_so.sh` script is used to build a Shared Object (`*.go`), which can be called by `C`, `C++`, and `Python` on Linux machines.
+
+**Changing Destination**
+
+The default destination for build artifacts is `go-reader/bin`, but you can change the destination with a CLI argument.  For building on a Chromebook consider saving the artifacts in `/usr/local/go/bin`, e.g., `bash scripts/build_cli.sh /usr/local/go/bin`
+
+# Contributing
+
+[Spatial Current, Inc.](https://spatialcurrent.io) is currently accepting pull requests for this repository.  We'd love to have your contributions!  Please see [Contributing.md](https://github.com/spatialcurrent/go-reader-writer/blob/master/CONTRIBUTING.md) for how to get started.
+
+# License
+
+This work is distributed under the **MIT License**.  See **LICENSE** file.

cmd/grw.js/main.go

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+// =================================================================
+//
+// Copyright (C) 2018 Spatial Current, Inc. - All Rights Reserved
+// Released as open source under the MIT License.  See LICENSE file.
+//
+// =================================================================
+
+// grw.js is the Javascript version of go-reader-writer (GRW).
+//
+package main
+
+import (
+	"github.com/gopherjs/gopherjs/js"
+	"github.com/pkg/errors"
+	"github.com/spatialcurrent/go-reader-writer/grw"
+)
+
+func main() {
+	js.Global.Set("grw", map[string]interface{}{
+		"version": grw.Version,
+		"fetch":   FetchResource,
+	})
+}
+
+func FetchResource(uri string, alg string, callback func(...interface{}) *js.Object) {
+
+	go func() {
+
+		r, _, err := grw.ReadHTTPFile(uri, alg, false)
+		if err != nil {
+			callback("", errors.Wrap(err, "error opening resource from uri "+uri).Error())
+			return
+		}
+
+		b, err := r.ReadAll()
+		if err != nil {
+			callback("", errors.Wrap(err, "error reading from resource at uri "+uri).Error())
+			return
+		}
+
+		err = r.Close()
+		if err != nil {
+			callback("", errors.Wrap(err, "error closing resource at "+uri).Error())
+			return
+		}
+
+		callback(string(b), nil)
+	}()
+
+}