ios - 如何在 iOS swift 中做产品搜索 api？

Question

我正在使用亚马逊产品广告 API 搜索产品。安装 awscore 和 alamofire cocopods。完成了获取签名的功能，并为项目搜索添加了参数，以在表格 View 列表中获取产品图片、标题和描述。

这是我尝试获取亚马逊搜索的代码:

     private func signedParametersForParameters(parameters: [String: String]) -> [String: String] {
    let sortedKeys = Array(parameters.keys).sorted(by: <)

    let query = sortedKeys.map { String(format: "%@=%@", $0, parameters[$0] ?? "") }.joined(separator: "&")

    let stringToSign = "GET\nwebservices.amazon.in\n/onca/xml\n\(query)"
    print("stringToSign::::\(stringToSign)")

    let dataToSign = stringToSign.data(using: String.Encoding.utf8)
    let signature = AWSSignatureSignerUtility.hmacSign(dataToSign, withKey: CameraViewController.kAmazonAccessSecretKey, usingAlgorithm: UInt32(kCCHmacAlgSHA256))!

    var signedParams = parameters;
    signedParams["Signature"] = urlEncode(signature)
    print("urlencodesignature::\(urlEncode(signature))")

    return signedParams
}

public func urlEncode(_ input: String) -> String {
    let allowedCharacterSet = (CharacterSet(charactersIn: "!*'();:@&=+$,/?%#[] ").inverted)

    if let escapedString = input.addingPercentEncoding(withAllowedCharacters: allowedCharacterSet) {
        return escapedString
    }

    return ""
}
func send(url: String) -> String {
 //        activityIndicator.startAnimating()
    guard let url = URL(string: url) else {
        print("Error! Invalid URL!") //Do something else
 //            activityIndicator.stopAnimating()
        return ""
    }
    print("send URL: \(url)")
    let request = URLRequest(url: url)
    let semaphore = DispatchSemaphore(value: 0)

    var data: Data? = nil

    URLSession.shared.dataTask(with: request) { (responseData, _, _) -> Void in
        data = responseData

        print("send URL session data: \(String(describing: data))")
        let parser = XMLParser(data: data!)
        parser.delegate = self as? XMLParserDelegate
        if parser.parse() {
            print(self.results ?? "No results")
        }
        semaphore.signal()

        }.resume()

 //        activityIndicator.stopAnimating()
    semaphore.wait(timeout: .distantFuture)

    let reply = data.flatMap { String(data: $0, encoding: .utf8) } ?? ""
    return reply
}

public func getSearchItem(searchKeyword: String) -> [String:AnyObject]{

    let timestampFormatter: DateFormatter
    timestampFormatter = DateFormatter()
    timestampFormatter.timeZone = TimeZone(identifier: "GMT")
    timestampFormatter.dateFormat = "YYYY-MM-dd'T'HH:mm:ss'Z'"
    timestampFormatter.locale = Locale(identifier: "en_US_POSIX")

//        let responsegroupitem: String = "ItemAttributes"
//        let responsegroupImages:String = "Images"

//        activityIndicator.startAnimating()
    let operationParams: [String: String] = [
        "Service": "AWSECommerceService",
        "Operation": "ItemSearch",
        "ResponseGroup": "Images,ItemAttributes",
        "IdType": "ASIN",
        "SearchIndex":"All",
        "Keywords": searchKeyword,
        "AWSAccessKeyId": urlEncode(CameraViewController.kAmazonAccessID),
        "AssociateTag": urlEncode(CameraViewController.kAmazonAssociateTag),
        "Timestamp": urlEncode(timestampFormatter.string(from: Date()))]

    let signedParams = signedParametersForParameters(parameters: operationParams)



    let query = signedParams.map { "\($0)=\($1)" }.joined(separator: "&")
    let url = "http://webservices.amazon.in/onca/xml?" + query
    print("querydata::::\(query)")

    let reply = send(url: url)
    print("reply::::\(reply)")
 //        activityIndicator.stopAnimating()



    return [:]
}

创建桥接头文件#import。

func searchBarSearchButtonClicked(_ searchBar: UISearchBar) {

  getSearchItem(searchKeyword: searchKeyword)

}

这是我的控制台输出:

我的问题是点击搜索按钮时搜索的产品未列出。我不知道犯了什么错误。谁能帮我解决这个问题..

Answer 1

根据documentation :

The HTTPRequestURI component is the HTTP absolute path component of the URI up to, but not including, the query string. If the HTTPRequestURI is empty, use a forward slash ( / ).

HTTPRequestURI is always "/onca/xml" for Product Advertising API. HTTPVerb is either GET or POST.

尝试将 requestURL 设置为“/onca/xml”而不是完整的 URL，您不应在此部分发送完整的 URL 或查询字符串。

您还需要对发送的值进行百分比编码。您在应该进行百分比编码的响应组属性中发送逗号

let operationParams: [String: String] = [
    "Service": "AWSECommerceService",
    "Operation": "ItemSearch",
    "ResponseGroup": urlEncode("Images,ItemAttributes"),
    "IdType": "ASIN",
    "SearchIndex":"All",
    "Keywords": urlEncode(searchKeyword),
    "AWSAccessKeyId": urlEncode(CameraViewController.kAmazonAccessID),
    "AssociateTag": urlEncode(CameraViewController.kAmazonAssociateTag),
    "Timestamp": urlEncode(timestampFormatter.string(from: Date()))]

---

let stringToSign = "GET\n/onca/xml\n\(query)"

注意:您应该使用 https 而不是 http