我使用回形针将文件添加到我的模型。
我想使用 firefox 3.6 的新功能,xhr.sendAsBinary
,通过 ajax 请求发送文件。
这是我构建请求的方式:
var xhr = new XMLHttpRequest();
xhr.open("POST", "/photos?authenticity_token=" + token
+ "&photo[name]=" + img.name
+ "&photo[size]=" + img.size);
xhr.overrideMimeType('text/plain; charset=x-user-defined-binary');
xhr.sendAsBinary(bin);
name
和 size
毫无问题地保存在我的模型中,但文件本身没有被回形针捕获。
我的模型
class Photo < ActiveRecord::Base
has_attached_file :photo, :styles => { :medium => "300x300>", :thumb => "100x100>" }
end
迁移
def self.up
add_column :photos, :photo_file_name, :string
add_column :photos, :photo_content_type, :string
add_column :photos, :photo_file_size, :integer
add_column :photos, :photo_updated_at, :datetime
end
和我的 Controller
# POST /photos
# POST /photos.xml
def create
@photo = Photo.new(params[:photo])
respond_to do |format|
if @photo.save
format.html { redirect_to(@photo, :notice => 'Photo was successfully created.') }
format.xml { render :xml => @photo, :status => :created, :location => @photo }
else
format.html { render :action => "new" }
format.xml { render :xml => @photo.errors, :status => :unprocessable_entity }
end
end
end
知道如何解决这个问题吗?
谢谢
最佳答案
我终于成功了!
我的 javascript 发送文件看起来像这样
send : function() {
try {
var xhr = new XMLHttpRequest;
//var url = this.form.action;
var url = '/photos';
var boundary = this.generateBoundary();
var contentType = "multipart/form-data; boundary=" + boundary;
this.filesToUpload.forEach(function(file, index, all) {
xhr.open("POST", url, true);
xhr.setRequestHeader("Content-Type", contentType);
for (var header in this.headers) {
xhr.setRequestHeader(header, headers[header]);
}
var CRLF = "\r\n";
var request = "--" + boundary + CRLF;
request += 'Content-Disposition: form-data; ';
request += 'name="' + 'photo[name]' + '"' + CRLF + CRLF;
request += file.name + CRLF;
request += "--" + boundary + CRLF;
request += 'Content-Disposition: form-data; ';
request += 'name="' + 'photo[photo]' + '"; ';
request += 'filename="'+ file.fileName + '"' + CRLF;
request += "Content-Type: application/octet-stream" + CRLF + CRLF;
request += file.value + CRLF;
request+= "--" + boundary + "--" + CRLF;
xhr.sendAsBinary(request);
});
// finally send the request as binary data
//xhr.sendAsBinary(this.buildMessage(this.filesToUpload, boundary));
} catch(e) {
alert('send Error: ' + e);
}
}
现在 Paperclip 将文件作为普通输入文件
关于javascript - Paperclip 和 xhr.sendAsBinary,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/2306910/