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Python FTP 抓取和保存图像问题

2025年05月04日8java哥

编辑:我让它正常工作,只是不会下载任何东西...

现在我的代码简化了:

notions_ftp = ftplib.FTP(ftp_host, ftp_user, ftp_passwd) 
folder = "Leisure Arts - Images" 
notions_ftp.cwd(folder) 
image = open("015693PR-com.jpg","wb") 
notions_ftp.retrlines("RETR 015693PR-com.jpg", image.write) 
send_image = open("015693PR-com.jpg", 'r') 

这是我的输出:

'250 "/Leisure Arts - Images": is current directory.' 
'226 Transfer complete. 0 bytes in 0.00 sec. (0.000 Kb/s)' 

原帖: 好的,所以我整天都在搞乱这个。我是 Python FTP 的新手。所以我在这里搜索并找到了这个:

images = notions_ftp.nlst() 
    for image_name in image_names: 
        if found_url == False: 
            try: 
                for image in images: 
                    ftp_image_name = "./%s" % image_name 
                    if ftp_image_name == image: 
                        found_url = True 
                        image_name_we_want = image_name 
            except: 
                pass 
 
    # We failed to find an image for this product, it will have to be done manually 
    if found_url == False: 
        log.info("Image ain't there baby -- SKU: %s" % sku) 
        return False 
    # Hey we found something! Open the image.... 
    notions_ftp.retrlines("RETR %s" % image_name_we_want, open(image_name_we_want, "rb")) 
    1/0 

因此,我已将误差缩小到除以零之前的那一行。这是错误:

Traceback (most recent call last): 
  File "<console>", line 6, in <module> 
  File "<console>", line 39, in insert_image 
IOError: [Errno 2] No such file or directory: '411483CC-IT,IM.jpg' 

因此,如果您按照代码进行操作,您将看到图像在目录中,因为如果在我的代码第一行的目录列表中找到 image_name_we_want 则已设置。而且我知道它在那里,因为我自己正在查看 FTP 站点并且......它在那里很奇怪。因此,在所有这些过程中的某个时候,我将图像保存在本地,这是最需要的,但我早就忘记了我以前是怎么做到的。无论哪种方式,当它在列表中清楚地找到它时,为什么它认为图像不存在。

好的,所以我采纳了建议,现在我得到:

14:01:18,057 ERROR [pylons-admin] Image to big or corrupt! Skipping Image for product sku: 411483 
14:01:18,057 ERROR [pylons-admin] Image to big or corrupt! Skipping Image for product sku: 411483 
Traceback (most recent call last): 
  File "<console>", line 6, in <module> 
  File "<console>", line 40, in insert_image 
  File "/opt/local/Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/ftplib.py", line 418, in retrlines 
    callback(line) 
TypeError: 'file' object is not callable 
>>> 14:01:24,694 INFO  [pylons-admin] Script Done! Updated 0 Products w/ Images 

所以它得到了第一个图像,我认为它确实已损坏,但是当它继续处理下一个要处理的图像时,它会在文件对象上抛出该错误。所以这里是我如何改变它的,其余的代码没有放在第一位:

# Hey we found something! Open the image.... 
    f = open(image_name_we_want, "wb") 
    notions_ftp.retrlines("RETR %s" % image_name_we_want, f) 
    send_image = open(image_name_we_want, 'r') 
 
    # ...and send it for processing 
    try: 
        image_id = product_obj.set_image(send_image, 5, 1) 
    except IOError, error: 
        log.error("Image to big or corrupt! Skipping Image for product sku: %s" % sku) 
        image_id = False 
    else: 
        if image_id == False: 
            log.error("Could not Insert the image for product sku: %s" % sku) 
            f.close() 
            return False 
        else: 
            f.close() 
            os.remove(image_name_we_want) 
            return True 

请您参考如下方法:

您正在读取文件而不是写入文件。

所以不要使用 open(image_name_we_want, "rb") 使用 open(image_name_we_want, "wb")

[编辑] 如果你只是从 ftp 服务器获取数据,你也可以试试这个:

import urllib2 
fh = urllib2.urlopen('ftp://server/path/file.png') 
file('file.png', 'wb').write(fh.read()) 

此外,对于一个完整的工作示例,请阅读:http://docs.python.org/library/ftplib.html

您还缺少 open() 之后的 write