Ios 带有Google Vision API的请求-接收到无效的JSON负载和无效的\u参数
尝试按照中的说明从iOS应用程序创建请求,但收到无效的JSON有效负载和无效的\u参数错误消息。有什么建议吗 下面是我尝试使用的示例Ios 带有Google Vision API的请求-接收到无效的JSON负载和无效的\u参数,ios,json,google-api,http-post,google-vision,Ios,Json,Google Api,Http Post,Google Vision,尝试按照中的说明从iOS应用程序创建请求,但收到无效的JSON有效负载和无效的\u参数错误消息。有什么建议吗 下面是我尝试使用的示例 { "requests":[ { "image":{ "source":{ "imageUri": "https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_272x92dp.png"
{
"requests":[
{
"image":{
"source":{
"imageUri":
"https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_272x92dp.png"
}
},
"features":[
{
"type":"LOGO_DETECTION",
"maxResults":1
}
]
}
]
}
在我的iOS应用程序中,我创建了
let feature1 = ["type": "LOGO_DETECTION", "maxResults": 1] as [String : Any]
let features = [feature1]
let source = ["imageUri": "https://www.google.com/images/branding/googlelogo/2x/googlelogo_color_272x92dp.png"]
let image = ["source": source]
let request = ["image": image, "features": features] as [String : Any]
let requests = ["requests": [request]]
if let data = try? JSONSerialization.data(withJSONObject: requests, options: .prettyPrinted),
let str = String(data: data, encoding: .utf8) {
print(str)
}
let privateKey = "my............key"
let requestString = "https://vision.googleapis.com/v1/images:annotate?key=\(privateKey)"
Alamofire.request(requestString, method: .post, parameters: requests).responseString { (response) in
switch response.result {
case .success(let data):
print("data", data)
print(response.result)
case .failure(let error):
print(error)
}
}
我可以看到我的打印日志中有同样的东西
{
"requests" : [
{
"features" : [
{
"type" : "LOGO_DETECTION",
"maxResults" : 1
}
],
"image" : {
"source" : {
"imageUri" : "https:\/\/www.google.com\/images\/branding\/googlelogo\/2x\/googlelogo_color_272x92dp.png"
}
}
}
]
}
但我收到下面的错误消息
[BoringSSL] Function boringssl_context_get_peer_sct_list: line 1754 received sct extension length is less than sct data length
data {
"error": {
"code": 400,
"message": "Invalid JSON payload received. Unknown name \"requests[][features][][maxResults]\": Cannot bind query parameter. Field 'requests[][features][][maxResults]' could not be found in request message.\nInvalid JSON payload received. Unknown name \"requests[][image][source][imageUri]\": Cannot bind query parameter. Field 'requests[][image][source][imageUri]' could not be found in request message.\nInvalid JSON payload received. Unknown name \"requests[][features][][type]\": Cannot bind query parameter. Field 'requests[][features][][type]' could not be found in request message.",
"status": "INVALID_ARGUMENT",
"details": [
{
"@type": "type.googleapis.com/google.rpc.BadRequest",
"fieldViolations": [
{
"description": "Invalid JSON payload received. Unknown name \"requests[][features][][maxResults]\": Cannot bind query parameter. Field 'requests[][features][][maxResults]' could not be found in request message."
},
{
"description": "Invalid JSON payload received. Unknown name \"requests[][image][source][imageUri]\": Cannot bind query parameter. Field 'requests[][image][source][imageUri]' could not be found in request message."
},
{
"description": "Invalid JSON payload received. Unknown name \"requests[][features][][type]\": Cannot bind query parameter. Field 'requests[][features][][type]' could not be found in request message."
}
]
}
]
}
}
正确答案
1.移除
if let data = try? JSONSerialization.data(withJSONObject: requests, options: .prettyPrinted),
let str = String(data: data, encoding: .utf8) {
print(str)
}
2.改变
Alamofire.request(requestString, method: .post, parameters: requests).responseString { (response) in
到
乍一看,错误非常明显: 未知名称请求[][features][[maxResults]:无法绑定查询参数。在请求消息中找不到字段。 未知名称请求[][image][source][imageUri]:无法绑定查询参数。在请求消息中找不到字段。 未知名称请求[][features][[type]:无法绑定查询参数。在请求消息中找不到字段。 但将您的控制台输出与文档中的示例进行比较,结果是一致的。我猜问题是两种可能性之一: 请求中完全缺少有效负载,或者 您没有正确编码有效负载。 为了在下次发生这种情况时帮助您,我建议您通过构建一个工作负载并通过Curl或Postman发送它来进行调试,以消除您的应用程序是罪魁祸首 一旦您拥有有效的有效负载,请将您的Swift应用程序指向并将您的请求发送到该应用程序。这将允许您检查发送的内容,并将其与工作示例进行比较 现在来解决它: 原来问题是2-您没有正确编码它。或者更确切地说,您是,但您没有发送编码字符串 请看这一行:
let requests = ["requests": [request]]
if let data = try? JSONSerialization.data(withJSONObject: requests, options: .prettyPrinted),
let str = String(data: data, encoding: .utf8) {
print(str)
}
然后你会:
Alamofire.request(requestString, method: .post, parameters: requests).responseString { (response) in
注意您是如何在有效负载中使用请求的,而不是编码的str?您已将编码字符串隐藏在if语句中,使其无法使用。我在这里使用的是guard,它的代码更少,而且不会隐藏编码字符串,而且更安全:
let requests = ["requests": [request]]
guard let data = try? JSONSerialization.data(withJSONObject: requests, options: .prettyPrinted),
let encodedStr = String(data: data, encoding: .utf8) else { return }
Alamofire.request(requestString, method: .post, parameters: encodedStr).responseString { (response) in
// ^ use the right var here!
哦你是对的。修复了调用中额外参数“method”的错误,如果我将encodedStr放入参数soh god中。我们不需要自己对请求进行编码。请参阅我的编辑。感谢您帮助调试我的代码。我会发布答案:是的,你也可以这样做;
let requests = ["requests": [request]]
guard let data = try? JSONSerialization.data(withJSONObject: requests, options: .prettyPrinted),
let encodedStr = String(data: data, encoding: .utf8) else { return }
Alamofire.request(requestString, method: .post, parameters: encodedStr).responseString { (response) in
// ^ use the right var here!