DecodeQRCode

java.lang.Object
- nxt.http.APIServlet.APIRequestHandler
- - nxt.http.DecodeQRCode

```
public final class DecodeQRCode
extends APIServlet.APIRequestHandler
```
The DecodeQRCode API converts a base64-encoded image of a 2-D QR (Quick Response) code to a UTF-8 string, using the ZXing library.

The input qrCodeBase64 can be the output of the DecodeQRCode API.

Request parameters:
- qrCodeBase64 - A base64 string encoded from an image of a QR code. The length of the string must be less than the jetty server maximum allowed parameter length, currently 200,000 bytes.
Response fields:
- qrCodeData - A UTF-8 string decoded from the QR code.

Field Summary
- Fields inherited from class nxt.http.APIServlet.APIRequestHandler
  DESCRIPTION_FIELD, MESSAGE_FIELD, NAME_FIELD

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`protected boolean`	`allowRequiredBlockParameters()`
`protected org.json.simple.JSONStreamAware`	`processRequest(javax.servlet.http.HttpServletRequest request)`
`protected boolean`	`requireBlockchain()`
`protected boolean`	`requirePost()`

Methods inherited from class nxt.http.APIServlet.APIRequestHandler
getAPITags, getFileParameter, getParameters, processRequest, requireFullClient, requirePassword, startDbTransaction

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - processRequest
```
protected org.json.simple.JSONStreamAware processRequest(javax.servlet.http.HttpServletRequest request)
                                                  throws NxtException
```
    Specified by:
    
    processRequest in class APIServlet.APIRequestHandler
    
    Throws:
    
    NxtException
  - requirePost
```
protected final boolean requirePost()
```
    Overrides:
    
    requirePost in class APIServlet.APIRequestHandler
  - allowRequiredBlockParameters
```
protected boolean allowRequiredBlockParameters()
```
    Overrides:
    
    allowRequiredBlockParameters in class APIServlet.APIRequestHandler
  - requireBlockchain
```
protected boolean requireBlockchain()
```
    Overrides:
    
    requireBlockchain in class APIServlet.APIRequestHandler