Google 放置 API Web 服务使用 swift returns 错误 303

Question

我正在尝试通过 iOS（使用 swift）使用 Google Places Web 服务。我想这样做的原因 - 我想允许浏览地图上的地点，即使它们不在附近（唯一允许使用 iOS 提供的库进行搜索）。我还需要以编程方式执行此操作（因为在一个用例中我想允许浏览地图，而在另一个用例中 - 我希望这些地方保持不变而不是根据地图相机进行更改）。我不能使用 iOS 地点选择器，因为我希望地图显示有关其上地点的信息（并且在一个用例中不更改）... （如果你对这个问题有更好的设计思路，请告诉我..）

调用 Google Places API 网络服务时出现错误 303。在 Google API 网络服务上，它不计算调用次数，所以我认为它失败了，尽管 303 应该被重定向。

我构建了一个 class 用于与 Web 服务通信（我在配置中保存了服务器地址）。 class 的结构也可以立即提供结果（而不是在回调中）。

为什么我得到的是错误而不是重定向？有办法处理吗？关于如何避免重定向有什么想法吗？

谢谢！！

这是我的代码的（模板）——我减少了很多逻辑并保留了对 Web 服务的调用（PlaceMarker 只是一个 class I return，您可以修改它到字符串):

class GooglePlacesWS : NSObject, NSURLConnectionDelegate, NSURLConnectionDataDelegate , URLSessionDelegate{

var DataReady : Bool!;
var Data : Foundation.Data!;
var opQueue : OperationQueue!;
var _responseData : NSMutableData!;
var error = false;

func getPlacesNear(_ point : CLLocationCoordinate2D, _ radius: Double)->[PlaceMarker]!
{
    var retVal  = [PlaceMarker]();

    var locationJson = ["location": String(format:"%f, %f",point.latitude,point.longitude), "key": “MyKey”];

    if (radius > 0){
        locationJson["raidus"] = String(format:"%d",Int(radius));
    }

    // Fires the request to the server
    var reply : String = HtmlToText(FireRequest(locationJson));
    if reply == "" { return nil}

    return retVal;
}

//MARK: Connection

var session : URLSession? = nil;
var dataTasks : URLSessionTask? = nil;

func sendRequestNew(_ request : URLRequest)
{
    DataReady = false;
    Data = nil;

    let task = session!.dataTask(with: request, completionHandler: {data, response,error in

        if (error != nil){

            NSLog("Error reading data from web service: " + error!.localizedDescription);
            self.Data = nil;
            self.error = true;
            self.DataReady = true;
        }
        else{
            if (data != nil){
                self.Data = data;
                OSMemoryBarrier();
                self.DataReady = true;
            }
        }

    });
    task.resume();
    dataTasks = task;
}

// Changes a string to an HTML friendly tags (so the XML will transfer a string)
func textToHtml (_ htmlString : String) -> String
{
    var retHtml = htmlString;
    retHtml = retHtml.replacingOccurrences(of: "&",  with: "&amp;");
    retHtml = retHtml.replacingOccurrences(of: "<",  with: "&lt;");
    retHtml = retHtml.replacingOccurrences(of: ">",  with: "&gt;");
    retHtml = retHtml.replacingOccurrences(of: "\"", with: "&quot;");
    retHtml = retHtml.replacingOccurrences(of: "'",  with: "&#039;");
    //retHtml = retHtml.stringByReplacingOccurrencesOfString("\n", withString: "<br>");
    return retHtml;
}

// Changes an HTML string to a regular xml (changes the & tags to actual signs)
func HtmlToText(_ textString : String)->String
{
    var retString: String = textString;
    retString = retString.replacingOccurrences(of: "&amp;",  with:"&");
    retString = retString.replacingOccurrences(of: "&lt;",  with:"<");
    retString = retString.replacingOccurrences(of: "&gt;",  with:">");
    retString = retString.replacingOccurrences(of: "&quot;", with:"\"");
    retString = retString.replacingOccurrences(of: "&#039;",  with:"'");
    retString = retString.replacingOccurrences(of: "<br>", with:"\n");
    return retString;
}


// Sends the request to the server
func FireRequest (_ query : [String:String]) ->String
{
    var retVal : String = "";

    do{
        // Builds the final URL request (adds the headers, and the WS addy)
        let config :UserDefaults = UserDefaults();
        //var myDict: NSDictionary?
        if let path : String = config.object(forKey: "googleServerAddy") as? String
        {
            let url = URL(string: path);
            //let theRequest = NSMutableURLRequest(url: url!);
            var request = URLRequest(url: url!);
            request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
            request.httpMethod = "GET";
            request.httpBody = try JSONSerialization.data(withJSONObject: query, options: []);


            sendRequestNew(request);

            while (DataReady == false)
            {
                Thread.sleep(forTimeInterval: 0.01);
            }

            if (!error)
            {
                let result : Foundation.Data = Data!;

                // Reads the response...
                retVal = NSString(data: result, encoding:String.Encoding.utf8.rawValue)! as String;
            }
            else
            {
                retVal = "";
            }
        }
    }
    catch{

    }

    return retVal;
}


//MARK: NSURLConnection delegates
func connection(_ connection: NSURLConnection, willSend request: URLRequest, redirectResponse response: URLResponse?) -> URLRequest? {

    return request;
}


override init() {
    super.init();

    opQueue = OperationQueue();

    session = URLSession(configuration: URLSessionConfiguration.default, delegate: self, delegateQueue: opQueue);
    }
}

Answer 1

您可以使用 Alamofire，效果很好。用于 google 街景图像

import Foundation
import Alamofire
import AlamofireImage


class GoogleData {

    static let dataService = GoogleData()

    func getGoogleImages(_ latitude: Double, longitude: Double, heading: Double, id: String, key: Int){

        let url = "https://maps.googleapis.com/maps/api/streetview?size=400x300&location=" + String(latitude) + "," + String(longitude) +  "&heading=" + String(heading) +  "&fov=120&&pitch=-0.76&key=" + GOOGLE_API_KEY

            Alamofire.request(url).responseImage { (response) -> Void in

            print(response)
            guard let image = response.result.value else { return }

            print("alamo \(url) ")
            let returnObj = [image]

            ImageUtils.saveGoogleImageToFile(image , key: key, id: id)
            NotificationCenter.default.post(name: NSNotification.Name(rawValue: googleGetImagesNotificationKey), object: returnObj)
        }
    }
}

调用它：

GoogleData.dataService.getGoogleImages(yourlatitude, longitude: your.longitude, heading: someHeading, id: someId, key: someKey )

Answer 2

所以我遇到的问题出自这里：

let url = URL(string: path);
var request = URLRequest(url: url!);
request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
request.httpMethod = "GET";
request.httpBody = try JSONSerialization.data(withJSONObject: query, options: []);

看起来 - 此解决方案强制重定向。我不知道函数 addingPercentEncoding(withAllowedCharacters: NSCharacterSet.urlQueryAllowed) 所以我想使用 httpBody 来传输 GET 数据，这显然是错误的...

将代码更改为：

let actPath = path + "?" + query;
let url = URL(string: actPath);
var request = URLRequest(url: url!);
request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
request.httpMethod = "GET";

帮我解决了这个问题。注意 query 是获取字符串的查询——类似于

location=1.1, 2.2&radius=5&key=MY_KEY

Google 放置 API Web 服务使用 swift returns 错误 303

Google Places API web service using swift returns error 303

google-api

nsurlrequest

google-places-api

nsurlsession

swift