如何使用Net :: HTTP發送PNG圖像

Question

我試圖發送Paperclip上傳的圖像到API。

如何對它進行編碼？

現在我正在使用attachment.queued_for_write[:original].read來獲取該PNG的實際文件內容，並嘗試將其發送到我的請求正文中。但服務器沒有它。

當我通過郵遞員發送請求時，它工作正常。郵差是如何編碼的？不幸的是，試圖從Postman生成Ruby代碼不起作用，它只是在請求的主體中顯示文件[Object object]。

Answer 1

Postman docs say它使用標準表單發佈。 A quick search導致了此代碼：

require "net/http" 
require "uri" 

# Token used to terminate the file in the post body. Make sure it is not 
# present in the file you're uploading. 
# You might want to use `SecureRandom` class to generate this random strings 
BOUNDARY = "AaB03x" 

uri = URI.parse("http://something.com/uploads") 
file = "/path/to/your/testfile.txt" 

post_body = [] 
post_body < < "--#{BOUNDARY}\r\n" 
post_body < < "Content-Disposition: form-data; name='datafile'; filename='#{File.basename(file)}'\r\n" 
post_body < < "Content-Type: text/plain\r\n" 
post_body < < "\r\n" 
post_body < < File.read(file) 
post_body < < "\r\n--#{BOUNDARY}--\r\n" 

http = Net::HTTP.new(uri.host, uri.port) 
request = Net::HTTP::Post.new(uri.request_uri) 
request.body = post_body.join 
request["Content-Type"] = "multipart/form-data, boundary=#{BOUNDARY}" 

http.request(request)