我在下面使用此代码发送多部分参数
let headers = [
"Content-Type": "application/x-www-form-urlencoded",
"Authorization": "Bearer (myToken)",
"cache-control": "no-cache"
]
let parameters = [
[
"name": "firstname",
"value": "alex"
],
[
"name": "lastname",
"value": "black"
],
[
"name": "birthdate_day",
"value": "1"
],
[
"name": "birthdate_month",
"value": "5"
],
[
"name": "birthdate_year",
"value": "1989"
],
[
"name": "gender",
"value": "m"
],
[
"name": "avatar",
"fileName": "(imageURL)"
]
]
let boundary = "Boundary-(NSUUID().uuidString)"
var body = ""
let error: NSError? = nil
for param in parameters {
let paramName = param["name"]!
body += "--(boundary)rn"
body += "Content-Disposition:form-data; name="(paramName)""
if let filename = param["fileName"] {
if let contentType = param["content-type"] {
do {
let fileContent = try String(contentsOfFile: filename, encoding: String.Encoding.utf8)
if (error != nil) {
print(error as Any)
}
body += "; filename="(filename)"rn"
body += "Content-Type: (contentType)rnrn"
body += fileContent
} catch {
print(error)
}
}
} else if let paramValue = param["value"] {
body += "rnrn(paramValue)"
}
}
let postData = NSMutableData(data: body.data(using: String.Encoding.utf8)!)
let request = NSMutableURLRequest(url: NSURL(string: "myUrl")! as URL,
cachePolicy: .useProtocolCachePolicy,
timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data
let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
if (error != nil) {
print(error as Any)
} else {
let httpResponse = response as? HTTPURLResponse
print(httpResponse?.statusCode as Any)
}
})
dataTask.resume()
return dataTask
图像URL和其余数据,但我将收到SATUS代码500我知道此错误是服务器端,但是Android版本使用的是相同的API URL,而且工作良好,我知道此代码可以修复和也许很小的更改可以修复此代码的工作
- 使用
URL
代替NSURL -
var request = URLRequest
是可变的,使用此代替NSMutableURLRequest
-
var data = Data()
是可变的,使用此代替NSMutableData
- 使用
Data(contentsOf:options:)
方法安全地附加文件blob数据 - 参数中缺少
content-type
,因此使用application/octet-stream
使用CC_9默认MIME类型 - 根据服务器,可能有必要为上传提供文件名
我修复了上述所有问题,并将URLRequest.httpBody
生成代码移至以下扩展。
extension URLRequest {
private func formHeader(_ name: String, crlf: String, fileName: String? = nil, mimeType: String? = nil) -> String {
var str = "(crlf)Content-Disposition: form-data; name="(name)""
guard fileName != nil || mimeType != nil else { return str + crlf + crlf }
if let name = fileName {
str += "; filename="(name)""
}
str += crlf
if let type = mimeType {
str += "Content-Type: (type)(crlf)"
}
return str + crlf
}
private func getFileUrl(_ file: Any) -> URL? {
if let url = file as? String {
return URL(string: url)
}
return file as? URL
}
private func getFileData(_ url: URL) -> Data? {
do {
return try Data(contentsOf: url, options: .mappedIfSafe)
} catch {
print(error)
return nil
}
}
mutating func setPost(body parameters: [[String: Any]]) {
let boundary = "Boundary+(arc4random())(arc4random())"
self.setValue("multipart/form-data; boundary=(boundary)", forHTTPHeaderField: "Content-Type")
var data = Data()
data.append("--(boundary)".data(using: .utf8)!)
let crlf = "rn"
for parameter in parameters {
guard let paramName = parameter["name"] as? String else { continue }
if let value = parameter["value"] {
let header = formHeader(paramName, crlf: crlf)
data.append("(header)(value)".data(using: .utf8)!)
} else if let file = parameter["file"], let fileUrl = getFileUrl(file), let fileData = getFileData(fileUrl) {
let fileName = parameter["fileName"] as? String
let contentType = parameter["content-type"] as? String
let header = formHeader(paramName, crlf: crlf, fileName: fileName ?? fileUrl.lastPathComponent, mimeType: contentType ?? "application/octet-stream")
data.append(header.data(using: .utf8)!)
data.append(fileData)
} else {
print("(paramName): empty or invalid value")
continue
}
data.append("(crlf)--(boundary)".data(using: .utf8)!)
}
data.append("--(crlf)".data(using: .utf8)!)
self.httpBody = data
self.httpMethod = "POST"
}
}
用法
let parameters = [
["name": "firstname", "value": "alex"],
["name": "avatar", "file": URL],
["name": "avatar", "file": "file:///", "fileName": "image.png", "content-type": "image/png"]
]
request.setPost(body: parameters)
note 在参数中
-
file
密钥代表URL
对象或文件路径字符串。 -
fileName: image.png
用于后端,代表文件的名称。
最终添加标头并创建URLSession.shared.dataTask
作为原始代码。
update-2 功能而不是扩展
func getParameterData(_ name: String, parameter: [String : Any]) -> Data? {
var str = "rnContent-Disposition: form-data; name="(name)""
if let value = parameter["value"] {
return "(str)rnrn(value)".data(using: .utf8)!
}
guard
let file = parameter["file"],
let url = (file is String ? URL(string: file as! String) : file as? URL)
else {
return nil
}
let data: Data
do {
data = try Data(contentsOf: url, options: .mappedIfSafe)
} catch {
print(error)
return nil
}
let fileName = (parameter["fileName"] as? String) ?? url.lastPathComponent
str += "; filename="(fileName)"rn"
let contentType = (parameter["content-type"] as? String) ?? "application/octet-stream"
str += "Content-Type: (contentType)rn"
return (str + "rn").data(using: .utf8)! + data
}
func setPostRequestBody(_ request: inout URLRequest, parameters: [[String: Any]]) {
let boundary = "Boundary+(arc4random())(arc4random())"
request.setValue("multipart/form-data; boundary=(boundary)", forHTTPHeaderField: "Content-Type")
var data = Data()
data.append("--(boundary)".data(using: .utf8)!)
for parameter in parameters {
guard
let name = parameter["name"] as? String,
let value = getParameterData(name, parameter: parameter)
else {
continue
}
data.append(value)
data.append("rn--(boundary)".data(using: .utf8)!)
}
data.append("--rn".data(using: .utf8)!)
request.httpBody = data
}
USAGE-2
var request = URLRequest(url: URL(string: "myUrl")!, cachePolicy: .useProtocolCachePolicy, timeoutInterval: 10.0)
setPostRequestBody(&request, parameters: [
["name": "firstname", "value": "alex"],
["name": "avatar", "file": URL object or path String]
])
let dataTask = URLSession.shared.dataTask(with: request) { data, response, error in
guard error != nil else {
print(error!.localizedDescription)
return
}
let statusCocde = (response as? HTTPURLResponse)?.statusCode
print(statusCode ?? 0)
if let data = data {
print(String(data: data, encoding: .utf8) ?? "")
}
}
dataTask.resume()