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reorganization of _examples and add some new examples such as iris+groupcache+mysql+docker

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Former-commit-id: ed635ee95de7160cde11eaabc0c1dcb0e460a620
This commit is contained in:
Gerasimos (Makis) Maropoulos
2020-06-07 15:26:06 +03:00
parent 9fdcb4c7fb
commit ed45c77be5
328 changed files with 4262 additions and 41621 deletions
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168
_examples/dropzonejs/src/main.go Normal file
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package main
import (
"image/jpeg"
"image/png"
"io"
"os"
"path"
"path/filepath"
"strings"
"sync"
"github.com/kataras/iris/v12"
"github.com/nfnt/resize"
)
// $ go get -u github.com/nfnt/resize
const uploadsDir = "./public/uploads/"
type uploadedFile struct {
// {name: "", size: } are the dropzone's only requirements.
Name string `json:"name"`
Size int64 `json:"size"`
}
type uploadedFiles struct {
dir string
items []uploadedFile
mu sync.RWMutex // slices are safe but RWMutex is a good practise for you.
}
func scanUploads(dir string) *uploadedFiles {
f := new(uploadedFiles)
lindex := dir[len(dir)-1]
if lindex != os.PathSeparator && lindex != '/' {
dir += string(os.PathSeparator)
}
// create directories if necessary
// and if, then return empty uploaded files; skipping the scan.
if err := os.MkdirAll(dir, os.FileMode(0666)); err != nil {
return f
}
// otherwise scan the given "dir" for files.
f.scan(dir)
return f
}
func (f *uploadedFiles) scan(dir string) {
f.dir = dir
filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
// if it's directory or a thumbnail we saved earlier, skip it.
if info.IsDir() || strings.HasPrefix(info.Name(), "thumbnail_") {
return nil
}
f.add(info.Name(), info.Size())
return nil
})
}
func (f *uploadedFiles) add(name string, size int64) uploadedFile {
uf := uploadedFile{
Name: name,
Size: size,
}
f.mu.Lock()
f.items = append(f.items, uf)
f.mu.Unlock()
return uf
}
func (f *uploadedFiles) createThumbnail(uf uploadedFile) {
file, err := os.Open(path.Join(f.dir, uf.Name))
if err != nil {
return
}
defer file.Close()
name := strings.ToLower(uf.Name)
out, err := os.OpenFile(f.dir+"thumbnail_"+uf.Name,
os.O_WRONLY|os.O_CREATE, 0666)
if err != nil {
return
}
defer out.Close()
if strings.HasSuffix(name, ".jpg") {
// decode jpeg into image.Image
img, err := jpeg.Decode(file)
if err != nil {
return
}
// write new image to file
resized := resize.Thumbnail(180, 180, img, resize.Lanczos3)
jpeg.Encode(out, resized,
&jpeg.Options{Quality: jpeg.DefaultQuality})
} else if strings.HasSuffix(name, ".png") {
img, err := png.Decode(file)
if err != nil {
return
}
// write new image to file
resized := resize.Thumbnail(180, 180, img, resize.Lanczos3) // slower but better res
png.Encode(out, resized)
}
// and so on... you got the point, this code can be simplify, as a practise.
}
func main() {
app := iris.New()
app.RegisterView(iris.HTML("./views", ".html"))
app.HandleDir("/public", "./public")
app.Get("/", func(ctx iris.Context) {
ctx.View("upload.html")
})
files := scanUploads(uploadsDir)
app.Get("/uploads", func(ctx iris.Context) {
ctx.JSON(files.items)
})
app.Post("/upload", iris.LimitRequestBodySize(10<<20), func(ctx iris.Context) {
// Get the file from the dropzone request
file, info, err := ctx.FormFile("file")
if err != nil {
ctx.StatusCode(iris.StatusInternalServerError)
ctx.Application().Logger().Warnf("Error while uploading: %v", err.Error())
return
}
defer file.Close()
fname := info.Filename
// Create a file with the same name
// assuming that you have a folder named 'uploads'
out, err := os.OpenFile(uploadsDir+fname,
os.O_WRONLY|os.O_CREATE, 0666)
if err != nil {
ctx.StatusCode(iris.StatusInternalServerError)
ctx.Application().Logger().Warnf("Error while preparing the new file: %v", err.Error())
return
}
defer out.Close()
io.Copy(out, file)
// optionally, add that file to the list in order to be visible when refresh.
uploadedFile := files.add(fname, info.Size)
go files.createThumbnail(uploadedFile)
})
// start the server at http://localhost:8080
app.Listen(":8080")
}

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_examples/dropzonejs/src/public/css/dropzone.css Normal file
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/*
* The MIT License
* Copyright (c) 2012 Matias Meno <m@tias.me>
*/
@-webkit-keyframes passing-through {
0% {
opacity: 0;
-webkit-transform: translateY(40px);
-moz-transform: translateY(40px);
-ms-transform: translateY(40px);
-o-transform: translateY(40px);
transform: translateY(40px); }
30%, 70% {
opacity: 1;
-webkit-transform: translateY(0px);
-moz-transform: translateY(0px);
-ms-transform: translateY(0px);
-o-transform: translateY(0px);
transform: translateY(0px); }
100% {
opacity: 0;
-webkit-transform: translateY(-40px);
-moz-transform: translateY(-40px);
-ms-transform: translateY(-40px);
-o-transform: translateY(-40px);
transform: translateY(-40px); } }
@-moz-keyframes passing-through {
0% {
opacity: 0;
-webkit-transform: translateY(40px);
-moz-transform: translateY(40px);
-ms-transform: translateY(40px);
-o-transform: translateY(40px);
transform: translateY(40px); }
30%, 70% {
opacity: 1;
-webkit-transform: translateY(0px);
-moz-transform: translateY(0px);
-ms-transform: translateY(0px);
-o-transform: translateY(0px);
transform: translateY(0px); }
100% {
opacity: 0;
-webkit-transform: translateY(-40px);
-moz-transform: translateY(-40px);
-ms-transform: translateY(-40px);
-o-transform: translateY(-40px);
transform: translateY(-40px); } }
@keyframes passing-through {
0% {
opacity: 0;
-webkit-transform: translateY(40px);
-moz-transform: translateY(40px);
-ms-transform: translateY(40px);
-o-transform: translateY(40px);
transform: translateY(40px); }
30%, 70% {
opacity: 1;
-webkit-transform: translateY(0px);
-moz-transform: translateY(0px);
-ms-transform: translateY(0px);
-o-transform: translateY(0px);
transform: translateY(0px); }
100% {
opacity: 0;
-webkit-transform: translateY(-40px);
-moz-transform: translateY(-40px);
-ms-transform: translateY(-40px);
-o-transform: translateY(-40px);
transform: translateY(-40px); } }
@-webkit-keyframes slide-in {
0% {
opacity: 0;
-webkit-transform: translateY(40px);
-moz-transform: translateY(40px);
-ms-transform: translateY(40px);
-o-transform: translateY(40px);
transform: translateY(40px); }
30% {
opacity: 1;
-webkit-transform: translateY(0px);
-moz-transform: translateY(0px);
-ms-transform: translateY(0px);
-o-transform: translateY(0px);
transform: translateY(0px); } }
@-moz-keyframes slide-in {
0% {
opacity: 0;
-webkit-transform: translateY(40px);
-moz-transform: translateY(40px);
-ms-transform: translateY(40px);
-o-transform: translateY(40px);
transform: translateY(40px); }
30% {
opacity: 1;
-webkit-transform: translateY(0px);
-moz-transform: translateY(0px);
-ms-transform: translateY(0px);
-o-transform: translateY(0px);
transform: translateY(0px); } }
@keyframes slide-in {
0% {
opacity: 0;
-webkit-transform: translateY(40px);
-moz-transform: translateY(40px);
-ms-transform: translateY(40px);
-o-transform: translateY(40px);
transform: translateY(40px); }
30% {
opacity: 1;
-webkit-transform: translateY(0px);
-moz-transform: translateY(0px);
-ms-transform: translateY(0px);
-o-transform: translateY(0px);
transform: translateY(0px); } }
@-webkit-keyframes pulse {
0% {
-webkit-transform: scale(1);
-moz-transform: scale(1);
-ms-transform: scale(1);
-o-transform: scale(1);
transform: scale(1); }
10% {
-webkit-transform: scale(1.1);
-moz-transform: scale(1.1);
-ms-transform: scale(1.1);
-o-transform: scale(1.1);
transform: scale(1.1); }
20% {
-webkit-transform: scale(1);
-moz-transform: scale(1);
-ms-transform: scale(1);
-o-transform: scale(1);
transform: scale(1); } }
@-moz-keyframes pulse {
0% {
-webkit-transform: scale(1);
-moz-transform: scale(1);
-ms-transform: scale(1);
-o-transform: scale(1);
transform: scale(1); }
10% {
-webkit-transform: scale(1.1);
-moz-transform: scale(1.1);
-ms-transform: scale(1.1);
-o-transform: scale(1.1);
transform: scale(1.1); }
20% {
-webkit-transform: scale(1);
-moz-transform: scale(1);
-ms-transform: scale(1);
-o-transform: scale(1);
transform: scale(1); } }
@keyframes pulse {
0% {
-webkit-transform: scale(1);
-moz-transform: scale(1);
-ms-transform: scale(1);
-o-transform: scale(1);
transform: scale(1); }
10% {
-webkit-transform: scale(1.1);
-moz-transform: scale(1.1);
-ms-transform: scale(1.1);
-o-transform: scale(1.1);
transform: scale(1.1); }
20% {
-webkit-transform: scale(1);
-moz-transform: scale(1);
-ms-transform: scale(1);
-o-transform: scale(1);
transform: scale(1); } }
.dropzone, .dropzone * {
box-sizing: border-box; }
.dropzone {
min-height: 150px;
border: 2px solid rgba(0, 0, 0, 0.3);
background: white;
padding: 20px 20px; }
.dropzone.dz-clickable {
cursor: pointer; }
.dropzone.dz-clickable * {
cursor: default; }
.dropzone.dz-clickable .dz-message, .dropzone.dz-clickable .dz-message * {
cursor: pointer; }
.dropzone.dz-started .dz-message {
display: none; }
.dropzone.dz-drag-hover {
border-style: solid; }
.dropzone.dz-drag-hover .dz-message {
opacity: 0.5; }
.dropzone .dz-message {
text-align: center;
margin: 2em 0; }
.dropzone .dz-preview {
position: relative;
display: inline-block;
vertical-align: top;
margin: 16px;
min-height: 100px; }
.dropzone .dz-preview:hover {
z-index: 1000; }
.dropzone .dz-preview:hover .dz-details {
opacity: 1; }
.dropzone .dz-preview.dz-file-preview .dz-image {
border-radius: 20px;
background: #999;
background: linear-gradient(to bottom, #eee, #ddd); }
.dropzone .dz-preview.dz-file-preview .dz-details {
opacity: 1; }
.dropzone .dz-preview.dz-image-preview {
background: white; }
.dropzone .dz-preview.dz-image-preview .dz-details {
-webkit-transition: opacity 0.2s linear;
-moz-transition: opacity 0.2s linear;
-ms-transition: opacity 0.2s linear;
-o-transition: opacity 0.2s linear;
transition: opacity 0.2s linear; }
.dropzone .dz-preview .dz-remove {
font-size: 14px;
text-align: center;
display: block;
cursor: pointer;
border: none; }
.dropzone .dz-preview .dz-remove:hover {
text-decoration: underline; }
.dropzone .dz-preview:hover .dz-details {
opacity: 1; }
.dropzone .dz-preview .dz-details {
z-index: 20;
position: absolute;
top: 0;
left: 0;
opacity: 0;
font-size: 13px;
min-width: 100%;
max-width: 100%;
padding: 2em 1em;
text-align: center;
color: rgba(0, 0, 0, 0.9);
line-height: 150%; }
.dropzone .dz-preview .dz-details .dz-size {
margin-bottom: 1em;
font-size: 16px; }
.dropzone .dz-preview .dz-details .dz-filename {
white-space: nowrap; }
.dropzone .dz-preview .dz-details .dz-filename:hover span {
border: 1px solid rgba(200, 200, 200, 0.8);
background-color: rgba(255, 255, 255, 0.8); }
.dropzone .dz-preview .dz-details .dz-filename:not(:hover) {
overflow: hidden;
text-overflow: ellipsis; }
.dropzone .dz-preview .dz-details .dz-filename:not(:hover) span {
border: 1px solid transparent; }
.dropzone .dz-preview .dz-details .dz-filename span, .dropzone .dz-preview .dz-details .dz-size span {
background-color: rgba(255, 255, 255, 0.4);
padding: 0 0.4em;
border-radius: 3px; }
.dropzone .dz-preview:hover .dz-image img {
-webkit-transform: scale(1.05, 1.05);
-moz-transform: scale(1.05, 1.05);
-ms-transform: scale(1.05, 1.05);
-o-transform: scale(1.05, 1.05);
transform: scale(1.05, 1.05);
-webkit-filter: blur(8px);
filter: blur(8px); }
.dropzone .dz-preview .dz-image {
border-radius: 20px;
overflow: hidden;
width: 120px;
height: 120px;
position: relative;
display: block;
z-index: 10; }
.dropzone .dz-preview .dz-image img {
display: block; }
.dropzone .dz-preview.dz-success .dz-success-mark {
-webkit-animation: passing-through 3s cubic-bezier(0.77, 0, 0.175, 1);
-moz-animation: passing-through 3s cubic-bezier(0.77, 0, 0.175, 1);
-ms-animation: passing-through 3s cubic-bezier(0.77, 0, 0.175, 1);
-o-animation: passing-through 3s cubic-bezier(0.77, 0, 0.175, 1);
animation: passing-through 3s cubic-bezier(0.77, 0, 0.175, 1); }
.dropzone .dz-preview.dz-error .dz-error-mark {
opacity: 1;
-webkit-animation: slide-in 3s cubic-bezier(0.77, 0, 0.175, 1);
-moz-animation: slide-in 3s cubic-bezier(0.77, 0, 0.175, 1);
-ms-animation: slide-in 3s cubic-bezier(0.77, 0, 0.175, 1);
-o-animation: slide-in 3s cubic-bezier(0.77, 0, 0.175, 1);
animation: slide-in 3s cubic-bezier(0.77, 0, 0.175, 1); }
.dropzone .dz-preview .dz-success-mark, .dropzone .dz-preview .dz-error-mark {
pointer-events: none;
opacity: 0;
z-index: 500;
position: absolute;
display: block;
top: 50%;
left: 50%;
margin-left: -27px;
margin-top: -27px; }
.dropzone .dz-preview .dz-success-mark svg, .dropzone .dz-preview .dz-error-mark svg {
display: block;
width: 54px;
height: 54px; }
.dropzone .dz-preview.dz-processing .dz-progress {
opacity: 1;
-webkit-transition: all 0.2s linear;
-moz-transition: all 0.2s linear;
-ms-transition: all 0.2s linear;
-o-transition: all 0.2s linear;
transition: all 0.2s linear; }
.dropzone .dz-preview.dz-complete .dz-progress {
opacity: 0;
-webkit-transition: opacity 0.4s ease-in;
-moz-transition: opacity 0.4s ease-in;
-ms-transition: opacity 0.4s ease-in;
-o-transition: opacity 0.4s ease-in;
transition: opacity 0.4s ease-in; }
.dropzone .dz-preview:not(.dz-processing) .dz-progress {
-webkit-animation: pulse 6s ease infinite;
-moz-animation: pulse 6s ease infinite;
-ms-animation: pulse 6s ease infinite;
-o-animation: pulse 6s ease infinite;
animation: pulse 6s ease infinite; }
.dropzone .dz-preview .dz-progress {
opacity: 1;
z-index: 1000;
pointer-events: none;
position: absolute;
height: 16px;
left: 50%;
top: 50%;
margin-top: -8px;
width: 80px;
margin-left: -40px;
background: rgba(255, 255, 255, 0.9);
-webkit-transform: scale(1);
border-radius: 8px;
overflow: hidden; }
.dropzone .dz-preview .dz-progress .dz-upload {
background: #333;
background: linear-gradient(to bottom, #666, #444);
position: absolute;
top: 0;
left: 0;
bottom: 0;
width: 0;
-webkit-transition: width 300ms ease-in-out;
-moz-transition: width 300ms ease-in-out;
-ms-transition: width 300ms ease-in-out;
-o-transition: width 300ms ease-in-out;
transition: width 300ms ease-in-out; }
.dropzone .dz-preview.dz-error .dz-error-message {
display: block; }
.dropzone .dz-preview.dz-error:hover .dz-error-message {
opacity: 1;
pointer-events: auto; }
.dropzone .dz-preview .dz-error-message {
pointer-events: none;
z-index: 1000;
position: absolute;
display: block;
display: none;
opacity: 0;
-webkit-transition: opacity 0.3s ease;
-moz-transition: opacity 0.3s ease;
-ms-transition: opacity 0.3s ease;
-o-transition: opacity 0.3s ease;
transition: opacity 0.3s ease;
border-radius: 8px;
font-size: 13px;
top: 130px;
left: -10px;
width: 140px;
background: #be2626;
background: linear-gradient(to bottom, #be2626, #a92222);
padding: 0.5em 1.2em;
color: white; }
.dropzone .dz-preview .dz-error-message:after {
content: '';
position: absolute;
top: -6px;
left: 64px;
width: 0;
height: 0;
border-left: 6px solid transparent;
border-right: 6px solid transparent;
border-bottom: 6px solid #be2626; }

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_examples/dropzonejs/src/public/js/dropzone.js Normal file
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_examples/dropzonejs/src/views/upload.html Normal file
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<html>
<head>
<title>DropzoneJS Uploader</title>
<!-- 1 -->
<link href="/public/css/dropzone.css" type="text/css" rel="stylesheet" />
<!-- 2 -->
<script src="/public/js/dropzone.js"></script>
<!-- 4 -->
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<!-- 5 -->
<script>
Dropzone.options.myDropzone = {
paramName: "file", // The name that will be used to transfer the file
init: function () {
thisDropzone = this;
// 6
$.get('/uploads', function (data) {
if (data == null) {
return;
}
// 7
$.each(data, function (key, value) {
var mockFile = { name: value.name, size: value.size };
thisDropzone.emit("addedfile", mockFile);
thisDropzone.options.thumbnail.call(thisDropzone, mockFile, '/public/uploads/thumbnail_' + value.name);
// thisDropzone.createThumbnailFromUrl(mockFile, '/public/uploads/' + value.name); <- doesn't work...
// Make sure that there is no progress bar, etc...
thisDropzone.emit("complete", mockFile);
});
});
}
};
</script>
</head>
<body>
<!-- 3 -->
<form action="/upload" method="POST" class="dropzone" id="my-dropzone">
<div class="fallback">
<input name="file" type="file" multiple />
<input type="submit" value="Upload" />
</div>
</form>
</body>
</html>