最近在使用django做图片上传的时候，发现一个问题就是，有些在别处下载过来的图片，如果不修改名称就使用的话，导致的结果就是，有时候直接输出会出现显示不了图片的情况，经过检查才发现，是因为图片的名称有特殊字符，导致输出失败，于是决定一下图片的命名方式；

下面是是我对图片进行截切的函数代码;

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
def upload_large_image_file(file, type='man'):
    '''文件上传函数,上传的文件夹一定要存在'''
    if file:
        size = 480
        #先移动文件，然后截取指定大小尺寸的文件
        parser = ImageFile.Parser()
        for content in file.chunks():
            parser.feed(content)
        img = parser.close()

        width, height = img.size
        if width > size:
            delta = width / size
            height = int(height / delta)
            img.thumbnail((size, height), Image.ANTIALIAS)


        name, ext = os.path.splitext(os.path.basename(file.name))
        name = uuid.uuid4().hex
        file_name = os.path.join('upload/'+type+'/large',name+'_large'+ext)
        path_name = os.path.join(MEDIA_ROOT, file_name)
        img.save(path_name)

        return(file_name)
    return(file_name)


def upload_middle_image_file(file, type='man'):
    '''文件上传函数,上传的文件夹一定要存在'''
    if file:
        size = 320
        #先移动文件，然后截取指定大小尺寸的文件
        parser = ImageFile.Parser()
        for content in file.chunks():
            parser.feed(content)
        img = parser.close()

        width, height = img.size
        if width > size:
            delta = width / size
            height = int(height / delta)
            img.thumbnail((size, height), Image.ANTIALIAS)


        name, ext = os.path.splitext(os.path.basename(file.name))
        name = uuid.uuid4().hex
        file_name = os.path.join('upload/'+type+'/middle',name+'_middle'+ext)
        path_name = os.path.join(MEDIA_ROOT, file_name)
        img.save(path_name)

        return(file_name)
    return(file_name)


def upload_small_image_file(file,type='man'):
    '''文件上传函数,上传的文件夹一定要存在'''
    if file:
        size = 100
        #先移动文件，然后截取指定大小尺寸的文件
        parser = ImageFile.Parser()
        for content in file.chunks():
            parser.feed(content)
        img = parser.close()

        width, height = img.size
        if width > size:
            delta = width / size
            height = int(height / delta)
            img.thumbnail((size, height), Image.ANTIALIAS)


        name, ext = os.path.splitext(os.path.basename(file.name))
        name = uuid.uuid4().hex
        file_name = os.path.join('upload/'+type+'/small',name+'_small'+ext)
        path_name = os.path.join(MEDIA_ROOT, file_name)
        img.save(path_name)

        return(file_name)
    return(file_name)