[英]ftp image upload causes image to be cut off swift
我正在測試我在 github 上找到的一些代碼,以通過 ftp 將圖像上傳到我的 IOS 應用程序中的網站。 問題是,當我嘗試上傳半大圖像時,上傳的圖像似乎已損壞,僅顯示頂部,其余部分被切斷。 它似乎適用於較小的圖像或具有較高壓縮率的大圖像。 有誰知道是什么原因造成的?
let ftpup = FTPUpload(baseUrl: "mysite.com", userName: "user@mysite.com", password: "password", directoryPath: "")
let image = UIImage(named: "medium")
let imagedata = UIImageJPEGRepresentation(image!, 1)
ftpup.send(data: imagedata!, with: "cloudpowa.jpg", success: {(success) -> Void in
if !success {
print("Failed upload!")
}
else {
print("image uploaded!")
}
})
ftp 代碼來自: https : //gist.github.com/Nirma/fb9991be776107d17fdcd6ed2aa02876
import Foundation
import CFNetwork
public class FTPUpload {
fileprivate let ftpBaseUrl: String
fileprivate let directoryPath: String
fileprivate let username: String
fileprivate let password: String
public init(baseUrl: String, userName: String, password: String, directoryPath: String) {
self.ftpBaseUrl = baseUrl
self.username = userName
self.password = password
self.directoryPath = directoryPath
}
}
// MARK: - Steam Setup
extension FTPUpload {
private func setFtpUserName(for ftpWriteStream: CFWriteStream, userName: CFString) {
let propertyKey = CFStreamPropertyKey(rawValue: kCFStreamPropertyFTPUserName)
CFWriteStreamSetProperty(ftpWriteStream, propertyKey, userName)
}
private func setFtpPassword(for ftpWriteStream: CFWriteStream, password: CFString) {
let propertyKey = CFStreamPropertyKey(rawValue: kCFStreamPropertyFTPPassword)
CFWriteStreamSetProperty(ftpWriteStream, propertyKey, password)
}
fileprivate func ftpWriteStream(forFileName fileName: String) -> CFWriteStream? {
let fullyQualifiedPath = "ftp://\(ftpBaseUrl)/\(directoryPath)/\(fileName)"
guard let ftpUrl = CFURLCreateWithString(kCFAllocatorDefault, fullyQualifiedPath as CFString, nil) else { return nil }
let ftpStream = CFWriteStreamCreateWithFTPURL(kCFAllocatorDefault, ftpUrl)
let ftpWriteStream = ftpStream.takeRetainedValue()
setFtpUserName(for: ftpWriteStream, userName: username as CFString)
setFtpPassword(for: ftpWriteStream, password: password as CFString)
return ftpWriteStream
}
}
// MARK: - FTP Write
extension FTPUpload {
public func send(data: Data, with fileName: String, success: @escaping ((Bool)->Void)) {
guard let ftpWriteStream = ftpWriteStream(forFileName: fileName) else {
success(false)
return
}
if CFWriteStreamOpen(ftpWriteStream) == false {
print("Could not open stream")
success(false)
return
}
let fileSize = data.count
let buffer = UnsafeMutablePointer<UInt8>.allocate(capacity: fileSize)
data.copyBytes(to: buffer, count: fileSize)
defer {
CFWriteStreamClose(ftpWriteStream)
buffer.deallocate(capacity: fileSize)
}
var offset: Int = 0
var dataToSendSize: Int = fileSize
repeat {
let bytesWritten = CFWriteStreamWrite(ftpWriteStream, &buffer[offset], dataToSendSize)
if bytesWritten > 0 {
offset += bytesWritten.littleEndian
dataToSendSize -= bytesWritten
continue
} else if bytesWritten < 0 {
// ERROR
print("FTPUpload - ERROR")
break
} else if bytesWritten == 0 {
// SUCCESS
print("FTPUpload - Completed!!")
break
}
} while CFWriteStreamCanAcceptBytes(ftpWriteStream)
success(true)
}
}
將 ftp 上傳類中的以下內容從
while CFWriteStreamCanAcceptBytes(ftpWriteStream)
到
while (true)
我發現它只用前者寫一次。
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