如何解决Java:发布请求的正文以“ NULL”的形式发送
我正在尝试通过POST请求以及一个SKU字符串从API访问定价数据。
发送服务器的字符串是SKU的JSON数组,其中所有空格都已删除(在代码下提供)。
通过Java / Eclipse访问时,我从服务器收到500错误,但是,通过邮递员发送类似请求时,我收到了所需的响应。
API将请求限制为每个响应100个,我需要填充6000多种价格,所以我不想通过邮递员来这样做。
我最终将编写一个循环来处理整个请求,但是在到达那里之前,我需要弄清楚服务器为什么用500个代码响应,并指出请求的主体为空。
这是我的代码:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.List;
public class PricingAPI {
private static HttpURLConnection connection;
public static void main(String[] args) {
// TODO Auto-generated method stub
// This is the reader to interpret what comes from API
BufferedReader readsFromURL;
// String the API reader appends to
String lineFromURL;
// Content that gets read from API URL and will be written to our own file
StringBuffer responseContent = new StringBuffer();
// this is the String that hold the sku to request 100 after
String skuStartAfter = "0";
// This is the SKU list to request from the API Server
List<String> jsonInputStringList;
// Used to take the list of strings and convert to single string
String jsonInputString;
// This is the file the jsonInpustString pulls from
Path skuList = FileSystems.getDefault().getPath("SKU.json");
try {
// This buffered reader pulls the text out of the JSON to be sent as body
jsonInputStringList = Files.readAllLines(skuList);
// Converts the list of strings to a single string
jsonInputString = String.join("",jsonInputStringList);
// Tests the content of the jsonInputString
System.out.println(jsonInputString);
// API Endpoint to send POST request to
URL url = new URL("https://emerson-api.emersonecologics.com/pricing/v1/pricing-request/?limit=100&startAfterId=" + skuStartAfter + "&endsWithId=");
// Opens connection and casts to HttpURLConnection
connection = (HttpURLConnection) url.openConnection();
// Tests the URL connection by printing it out for us to view
System.out.println(url);
// HTTP Request Setup
// Set method to post
connection.setRequestMethod("POST");
// Allow output from API
connection.setDoOutput(true);
// Get the output stream and assign to 'os' variable
OutputStream os = connection.getOutputStream();
// Convert SKU JSON file to Bytes and put into an array
byte [] input = jsonInputString.getBytes("utf-8");
// Write byte array "input" to the output stream for body of the HTTP Request
os.write(input,input.length);
// connection.setRequestProperty("Content-Type","application/json; utf-8");
// connection.setRequestProperty("Accept","application/json");
connection.setConnectTimeout(5000);
connection.setReadTimeout(5000);
// If there is an error this block runs
if (connection.getResponseCode() > 299) {
readsFromURL = new BufferedReader(new InputStreamReader(connection.getErrorStream()));
while ((lineFromURL = readsFromURL.readLine()) != null) {
responseContent.append(lineFromURL);
}
readsFromURL.close();
// Connection Status Indicator (200-500)
System.out.println(responseContent);
System.out.println(connection.getResponseCode());
}
// If there is no error the content is added to responseContent
else {
readsFromURL = new BufferedReader(new InputStreamReader(connection.getInputStream()));
while ((lineFromURL = readsFromURL.readLine()) != null) {
responseContent.append(lineFromURL.substring(163,lineFromURL.length()-52));
}
System.out.println(responseContent);
readsFromURL.close();
}
}catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
这是我作为jsonInputString获得的前100个SKU:
{"skus":["A16411","A16413","A16723","A16735","A16722","A16904","A16738","A16747","A16750","A34989","A16726","A16415","A16725","A16936","A16418","A16412","A16739","A16934","A16933","A64049","A67071","A67064","A16705","A16403","A16937","A16704","A16941","A16703","A16414","A16733","A16724","A66501","5HYDR","A71901","A7060","ACG16","ACET2","ACETY","AR70461","ADRE3","A70760","A70102","ALAR60","AIDII","A69109","A77490","ANTIO","ARTEM","ART33","ARTHR","A77510","A65702","A65603","A72809","BIFID","BIOTI","A76510","A71604","A76440","BRAI2","REMIN","BUFCC","BUF21","A50203","BUFCP","BUTYR","CALC2","CMCI2","PYRUV","CALM","CALM1","A72007","A74704","CAT4","CELLU","CHMVM","CHITO","CHRON","COQ30","COQ12","COMPL","COPP2","COQGA","COQ52","CQTOC","CQH60","A72908","A68802","AR76670","DHA8","DHE30","DHE31","DHE14","DHE11","DIM2","DIM5","DIM4","DRWI2","EARTH","A77100"]}
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