import Foundation
struct MultipartFormDataRequest {
private let boundary: String = UUID().uuidString
var httpBody = NSMutableData()
let url: URL
init(url: URL) {
self.url = url
}
func addTextField(named name: String, value: String) {
httpBody.appendString(textFormField(named: name, value: value))
}
private func textFormField(named name: String, value: String) -> String {
var fieldString = "--\(boundary)\r\n"
fieldString += "Content-Disposition: form-data; name=\"\(name)\"\r\n"
fieldString += "Content-Type: text/plain; charset=ISO-8859-1\r\n"
fieldString += "Content-Transfer-Encoding: 8bit\r\n"
fieldString += "\r\n"
fieldString += "\(value)\r\n"
return fieldString
}
func addDataField(fieldName: String, fileName: String, data: Data, mimeType: String) {
httpBody.append(dataFormField(fieldName: fieldName,fileName:fileName,data: data, mimeType: mimeType))
}
private func dataFormField(fieldName: String,
fileName: String,
data: Data,
mimeType: String) -> Data {
let fieldData = NSMutableData()
fieldData.appendString("--\(boundary)\r\n")
fieldData.appendString("Content-Disposition: form-data; name=\"\(fieldName)\"; filename=\"\(fileName)\"\r\n")
fieldData.appendString("Content-Type: \(mimeType)\r\n")
fieldData.appendString("\r\n")
fieldData.append(data)
fieldData.appendString("\r\n")
return fieldData as Data
}
func asURLRequest() -> URLRequest {
var request = URLRequest(url: url)
request.httpMethod = "POST"
request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
httpBody.appendString("--\(boundary)--")
request.httpBody = httpBody as Data
return request
}
}
extension NSMutableData {
func appendString(_ string: String) {
if let data = string.data(using: .utf8) {
self.append(data)
}
}
}
extension URLSession {
func dataTask(with request: MultipartFormDataRequest,
completionHandler: @escaping (Data?, URLResponse?, Error?) -> Void)
-> URLSessionDataTask {
return dataTask(with: request.asURLRequest(), completionHandler: completionHandler)
}
}
使用该函数调用上传文件func
func uploadFile(file:Data, fileName: String, fileExtension: String){
var mimeType = "image/png"
if fileExtension == "PDF" {
mimeType = "application/pdf"
}
let url = "https://v2.convertapi.com/upload"
let request = MultipartFormDataRequest(url: URL(string: url)!)
request.addDataField(fieldName: "file", fileName: fileName, data: file, mimeType: mimeType)
URLSession.shared.dataTask(with: request, completionHandler: {data,urlResponse,error in
}).resume()
}
#资源：
https://www.donnywals.com/uploading-images-and-forms-to-a-server-using-urlsession/
https://orjpap.github.io/swift/http/ios/urlsession/2021/04/26/Multipart-Form-Requests.html