如何构建 json 格式的请求正文
How to build the body of a request in json format
这是我应该调用的请求:
listing library contents
GET https://photoslibrary.googleapis.com/v1/mediaItems
Content-type: application/json
Authorization: Bearer oauth2-token
{
"pageSize": "100",
}
这是我尝试过的:
public String getJSON(String url, int timeout) {
String body1 = "{pageSize: 100,}";
String body2 = "{\"pageSize\": \"100\",}";
HttpURLConnection request = null;
try {
URL u = new URL(url);
request = (HttpURLConnection) u.openConnection();
request.setRequestMethod("GET");
request.setRequestProperty("Authorization", "Bearer " + token);
request.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
request.setUseCaches(false);
request.setAllowUserInteraction(false);
request.setConnectTimeout(timeout);
request.setReadTimeout(timeout);
request.setRequestProperty("Content-Length", String.format(Locale.ENGLISH, "%d", body2.getBytes().length));
OutputStream outputStream = request.getOutputStream();
outputStream.write(body2.getBytes());
outputStream.close();
request.connect();
int status = request.getResponseCode();
switch (status) {
case 200:
case 201:
BufferedReader br = new BufferedReader(new InputStreamReader(request.getInputStream()));
StringBuilder sb = new StringBuilder();
String line;
while ((line = br.readLine()) != null) {
sb.append(line+"\n");
}
br.close();
return sb.toString();
}
} catch (MalformedURLException ex) {
ex.printStackTrace();
} catch (IOException ex) {
ex.printStackTrace();
} finally {
if (request != null) {
try {
request.disconnect();
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
return null;
}
如果我使用 GET 方法,我会得到一个错误:
java.net.ProtocolException: method does not support a request body: GET
我试过 POST 但没有成功。
感谢您的帮助。
我认为文档有误,您应该使用 POST 请求而不是 GET。
记录的 JSON 请求正文中也存在错误:尾随逗号不应存在。使用以下内容:
String body2 = "{\"pageSize\": \"100\"}";
我认为您需要随此请求一起发送一个参数
您可以使用此查询在邮递员中尝试此请求
https://photoslibrary.googleapis.com/v1/mediaItems?pageSize=100
并在身份验证部分传递令牌。
在这里你可以做一些事情 -
eg
URI uri = new URIBuilder("https://photoslibrary.googleapis.com/v1/mediaItems")
.addParameter("pageSize", 100)
.build();
建议 - 对网络请求使用改造,对 JSON 转换使用 jackson-databind 项目。
这是我应该调用的请求: listing library contents
GET https://photoslibrary.googleapis.com/v1/mediaItems Content-type: application/json Authorization: Bearer oauth2-token { "pageSize": "100", }
这是我尝试过的:
public String getJSON(String url, int timeout) {
String body1 = "{pageSize: 100,}";
String body2 = "{\"pageSize\": \"100\",}";
HttpURLConnection request = null;
try {
URL u = new URL(url);
request = (HttpURLConnection) u.openConnection();
request.setRequestMethod("GET");
request.setRequestProperty("Authorization", "Bearer " + token);
request.setRequestProperty("Content-Type", "application/json; charset=UTF-8");
request.setUseCaches(false);
request.setAllowUserInteraction(false);
request.setConnectTimeout(timeout);
request.setReadTimeout(timeout);
request.setRequestProperty("Content-Length", String.format(Locale.ENGLISH, "%d", body2.getBytes().length));
OutputStream outputStream = request.getOutputStream();
outputStream.write(body2.getBytes());
outputStream.close();
request.connect();
int status = request.getResponseCode();
switch (status) {
case 200:
case 201:
BufferedReader br = new BufferedReader(new InputStreamReader(request.getInputStream()));
StringBuilder sb = new StringBuilder();
String line;
while ((line = br.readLine()) != null) {
sb.append(line+"\n");
}
br.close();
return sb.toString();
}
} catch (MalformedURLException ex) {
ex.printStackTrace();
} catch (IOException ex) {
ex.printStackTrace();
} finally {
if (request != null) {
try {
request.disconnect();
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
return null;
}
如果我使用 GET 方法,我会得到一个错误:
java.net.ProtocolException: method does not support a request body: GET
我试过 POST 但没有成功。
感谢您的帮助。
我认为文档有误,您应该使用 POST 请求而不是 GET。
记录的 JSON 请求正文中也存在错误:尾随逗号不应存在。使用以下内容:
String body2 = "{\"pageSize\": \"100\"}";
我认为您需要随此请求一起发送一个参数
您可以使用此查询在邮递员中尝试此请求
https://photoslibrary.googleapis.com/v1/mediaItems?pageSize=100
并在身份验证部分传递令牌。
在这里你可以做一些事情 -
eg
URI uri = new URIBuilder("https://photoslibrary.googleapis.com/v1/mediaItems")
.addParameter("pageSize", 100)
.build();
建议 - 对网络请求使用改造,对 JSON 转换使用 jackson-databind 项目。