github.com/openimsdk/tools@v0.0.49/s3/minio/thumbnail.go (about)

     1  // Copyright © 2023 OpenIM. All rights reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package minio
    16  
    17  import (
    18  	"bytes"
    19  	"context"
    20  	"fmt"
    21  	"golang.org/x/image/bmp"
    22  	"golang.org/x/image/tiff"
    23  	"image"
    24  	"image/gif"
    25  	"image/jpeg"
    26  	"image/png"
    27  	"net/url"
    28  	"path/filepath"
    29  	"strings"
    30  	"time"
    31  
    32  	"github.com/chai2010/webp"
    33  	"github.com/minio/minio-go/v7"
    34  	"github.com/openimsdk/tools/errs"
    35  	"github.com/openimsdk/tools/log"
    36  	"github.com/openimsdk/tools/s3"
    37  )
    38  
    39  func (m *Minio) getImageThumbnailURL(ctx context.Context, name string, expire time.Duration, opt *s3.Image) (string, error) {
    40  	var img image.Image
    41  	info, err := m.cache.GetImageObjectKeyInfo(ctx, name, func(ctx context.Context) (info *ImageInfo, err error) {
    42  		info, img, err = m.getObjectImageInfo(ctx, name)
    43  		return
    44  	})
    45  	if err != nil {
    46  		return "", err
    47  	}
    48  	if !info.IsImg {
    49  		return "", errs.New("object not image").Wrap()
    50  	}
    51  	if opt.Width > info.Width || opt.Width <= 0 {
    52  		opt.Width = info.Width
    53  	}
    54  	if opt.Height > info.Height || opt.Height <= 0 {
    55  		opt.Height = info.Height
    56  	}
    57  	opt.Format = strings.ToLower(opt.Format)
    58  	if opt.Format == formatJpg {
    59  		opt.Format = formatJpeg
    60  	}
    61  	switch opt.Format {
    62  	case formatPng, formatJpeg, formatGif:
    63  	default:
    64  		opt.Format = ""
    65  	}
    66  	reqParams := make(url.Values)
    67  	if opt.Width == info.Width && opt.Height == info.Height && (opt.Format == info.Format || opt.Format == "") {
    68  		reqParams.Set("response-content-type", "image/"+info.Format)
    69  		return m.PresignedGetObject(ctx, name, expire, reqParams)
    70  	}
    71  	if opt.Format == "" {
    72  		switch opt.Format {
    73  		case formatGif:
    74  			opt.Format = formatGif
    75  		case formatJpeg:
    76  			opt.Format = formatJpeg
    77  		case formatPng:
    78  			opt.Format = formatPng
    79  		default:
    80  			opt.Format = formatPng
    81  		}
    82  	}
    83  	key, err := m.cache.GetThumbnailKey(ctx, name, opt.Format, opt.Width, opt.Height, func(ctx context.Context) (string, error) {
    84  		if img == nil {
    85  			var reader *minio.Object
    86  			reader, err = m.core.Client.GetObject(ctx, m.bucket, name, minio.GetObjectOptions{})
    87  			if err != nil {
    88  				return "", err
    89  			}
    90  			defer reader.Close()
    91  			img, _, err = ImageStat(reader)
    92  			if err != nil {
    93  				return "", err
    94  			}
    95  		}
    96  		thumbnail := resizeImage(img, opt.Width, opt.Height)
    97  		buf := bytes.NewBuffer(nil)
    98  		switch opt.Format {
    99  		case formatPng:
   100  			err = png.Encode(buf, thumbnail)
   101  		case formatJpeg:
   102  			err = jpeg.Encode(buf, thumbnail, nil)
   103  		case formatGif:
   104  			err = gif.Encode(buf, thumbnail, nil)
   105  		case formatWebP:
   106  			err = webp.Encode(buf, thumbnail, nil)
   107  		case formatTiff:
   108  			err = tiff.Encode(buf, thumbnail, nil)
   109  		case formatBmp:
   110  			err = bmp.Encode(buf, thumbnail)
   111  		case formatAvif:
   112  			//err = avif.Encode(buf, img, nil)
   113  		case formatHeic, formatHeif:
   114  
   115  		}
   116  		if err != nil {
   117  			return "", errs.WrapMsg(err, "encode failed", "type", opt.Format)
   118  		}
   119  		cacheKey := filepath.Join(imageThumbnailPath, info.Etag, fmt.Sprintf("image_w%d_h%d.%s", opt.Width, opt.Height, opt.Format))
   120  		if _, err = m.core.Client.PutObject(ctx, m.bucket, cacheKey, buf, int64(buf.Len()), minio.PutObjectOptions{}); err != nil {
   121  			return "", err
   122  		}
   123  		return cacheKey, nil
   124  	})
   125  	if err != nil {
   126  		return "", err
   127  	}
   128  	reqParams.Set("response-content-type", "image/"+opt.Format)
   129  	return m.PresignedGetObject(ctx, key, expire, reqParams)
   130  }
   131  
   132  func (m *Minio) getObjectImageInfo(ctx context.Context, name string) (*ImageInfo, image.Image, error) {
   133  	fileInfo, err := m.StatObject(ctx, name)
   134  	if err != nil {
   135  		return nil, nil, err
   136  	}
   137  	if fileInfo.Size > maxImageSize {
   138  		return nil, nil, errs.New("file size too large").Wrap()
   139  	}
   140  	imageData, err := m.getObjectData(ctx, name, fileInfo.Size)
   141  	if err != nil {
   142  		return nil, nil, err
   143  	}
   144  	var info ImageInfo
   145  	imageInfo, format, err := ImageStat(bytes.NewReader(imageData))
   146  	if err == nil {
   147  		info.IsImg = true
   148  		info.Format = format
   149  		info.Width, info.Height = ImageWidthHeight(imageInfo)
   150  	} else {
   151  		info.IsImg = false
   152  	}
   153  	info.Etag = fileInfo.ETag
   154  	return &info, imageInfo, nil
   155  }
   156  
   157  func (m *Minio) delObjectImageInfoKey(ctx context.Context, key string, size int64) {
   158  	if size > 0 && size > maxImageSize {
   159  		return
   160  	}
   161  	if err := m.cache.DelObjectImageInfoKey(ctx, key); err != nil {
   162  		log.ZError(ctx, "DelObjectImageInfoKey failed", err, "key", key)
   163  	}
   164  }