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added support for MIME types and URIs to the NFC api #740

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added support for MIME types and URIs to the NFC api #740

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99 changes: 68 additions & 31 deletions app/src/main/java/com/termux/api/apis/NfcAPI.java
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,8 @@
import android.os.Bundle;
import android.os.Parcelable;
import android.util.JsonWriter;
import android.net.Uri;
import android.util.Base64;

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
Expand All @@ -30,7 +32,6 @@ public static void onReceive(final Context context, final Intent intent) {
}



public static class NfcActivity extends AppCompatActivity {

private NfcAdapter adapter;
Expand All @@ -39,7 +40,7 @@ public static class NfcActivity extends AppCompatActivity {
String mode;
String param;
String value;

String mime;
private static final String LOG_TAG = "NfcActivity";

//Check for NFC
Expand All @@ -52,7 +53,7 @@ public void writeJson(JsonWriter out) throws Exception {
if (error.length() > 0)
out.name("error").value(error);
out.name("nfcPresent").value(null != adapter);
if(null!=adapter)
if (null != adapter)
out.name("nfcActive").value(adapter.isEnabled());
out.endObject();
}
Expand All @@ -69,21 +70,32 @@ protected void onCreate(@Nullable Bundle savedInstanceState) {
mode = intent.getStringExtra("mode");
if (null == mode)
mode = "noData";
param =intent.getStringExtra("param");
param = intent.getStringExtra("param");
if (null == param)
param = "noData";
value=intent.getStringExtra("value");
value = intent.getStringExtra("value");
if (null == socket_input) socket_input = intent.getStringExtra("socket_input");
if (null == socket_output) socket_output = intent.getStringExtra("socket_output");
// this is being jankily hacked on because
// - i'm stupid
// - i'm lazy
// - the person who wrote this was stupid
// sorry that was mean
// -doskel, 2024
if (mode.equals("mimeWrite")) {
mime = intent.getStringExtra("mime");
mode = "write";
}

if (mode.equals("noData")) {
errorNfc(this, intent,"");
errorNfc(this, intent, "");
finish();
}
}

NfcAdapter adapter = NfcAdapter.getDefaultAdapter(this);
if((null==adapter)||(!adapter.isEnabled())){
errorNfc(this,intent,"");
if ((null == adapter) || (!adapter.isEnabled())) {
errorNfc(this, intent, "");
finish();
}
}
Expand Down Expand Up @@ -114,7 +126,7 @@ protected void onNewIntent(Intent intent) {
try {
postResult(this, intent);
} catch (Exception e) {
Logger.logStackTraceWithMessage(LOG_TAG, "Error posting result" ,e);
Logger.logStackTraceWithMessage(LOG_TAG, "Error posting result", e);
}
finish();
}
Expand Down Expand Up @@ -149,7 +161,7 @@ public void writeJson(JsonWriter out) throws Exception {
switch (param) {
case "text":
Logger.logVerbose(LOG_TAG, "Write start");
onReceiveNfcWrite(context, intent);
onReceiveNfcWrite(context, intent, out);
Logger.logVerbose(LOG_TAG, "Write end");
break;
default:
Expand All @@ -158,15 +170,15 @@ public void writeJson(JsonWriter out) throws Exception {
}
break;
case "read":
switch (param){
switch (param) {
case "short":
readNDEFTag(intent,out);
readNDEFTag(intent, out);
break;
case "full":
readFullNDEFTag(intent,out);
readFullNDEFTag(intent, out);
break;
case "noData":
readNDEFTag(intent,out);
readNDEFTag(intent, out);
break;
default:
onUnexpectedAction(out, "Wrong Params", "Should be correct param value");
Expand All @@ -177,20 +189,42 @@ public void writeJson(JsonWriter out) throws Exception {
onUnexpectedAction(out, "Wrong Params", "Should be correct mode value ");
break;
}
} catch (Exception e){
} catch (Exception e) {
onUnexpectedAction(out, "exception", e.getMessage());
}
}
});
}

public void onReceiveNfcWrite( final Context context, Intent intent) throws Exception {
public void onReceiveNfcWrite(final Context context, Intent intent, JsonWriter out) throws Exception {
Logger.logVerbose(LOG_TAG, "onReceiveNfcWrite");

NfcAdapter adapter = NfcAdapter.getDefaultAdapter(context);
Tag tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
NdefRecord record = NdefRecord.createTextRecord("en", value);
NdefMessage msg = new NdefMessage(new NdefRecord[]{record});
NdefMessage msg;
if (mime == null) {
NdefRecord record = NdefRecord.createTextRecord("en", value);
msg = new NdefMessage(new NdefRecord[]{record});
} else if (mime.equals("uri")) {
Uri uri;
try {
uri = Uri.parse(value);
} catch (Exception e) {
onUnexpectedAction(out, "Bad URI", "Should be a valid URI");
return;
}
NdefRecord record = NdefRecord.createUri(uri);
msg = new NdefMessage(new NdefRecord[]{record});
} else {
try {
byte[] data = Base64.decode(value, Base64.DEFAULT);
NdefRecord record = NdefRecord.createMime(mime, data);
msg = new NdefMessage(new NdefRecord[]{record});
} catch (Exception e) {
onUnexpectedAction(out, "Other error", "Unknown error");
return;
}
}
Ndef ndef = Ndef.get(tag);
ndef.connect();
ndef.writeNdefMessage(msg);
Expand All @@ -207,30 +241,30 @@ public void readNDEFTag(Intent intent, JsonWriter out) throws Exception {
Ndef ndefTag = Ndef.get(tag);
boolean bNdefPresent = false;
String[] strs = tag.getTechList();
for (String s: strs){
for (String s : strs) {
if (s.equals("android.nfc.tech.Ndef")) {
bNdefPresent = true;
break;
}
}
if (!bNdefPresent){
onUnexpectedAction(out, "Wrong Technology","termux API support only NFEF Tag");
if (!bNdefPresent) {
onUnexpectedAction(out, "Wrong Technology", "termux API support only NDEF Tag");
return;
}
NdefMessage[] nmsgs = new NdefMessage[msgs.length];
if (msgs.length == 1) {
nmsgs[0] = (NdefMessage) msgs[0];
NdefRecord[] records = nmsgs[0].getRecords();
out.beginObject();
if (records.length >0 ) {
if (records.length > 0) {
{
out.name("Record");
if (records.length > 1)
out.beginArray();
for (NdefRecord record: records){
for (NdefRecord record : records) {
out.beginObject();
int pos = 1 + record.getPayload()[0];
pos = (NdefRecord.TNF_WELL_KNOWN==record.getTnf())?(int)record.getPayload()[0]+1:0;
pos = (NdefRecord.TNF_WELL_KNOWN == record.getTnf()) ? (int) record.getPayload()[0] + 1 : 0;
int len = record.getPayload().length - pos;
byte[] msg = new byte[len];
System.arraycopy(record.getPayload(), pos, msg, 0, len);
Expand All @@ -255,22 +289,24 @@ public void readFullNDEFTag(Intent intent, JsonWriter out) throws Exception {

String[] strs = tag.getTechList();
boolean bNdefPresent = false;
for (String s: strs){
for (String s : strs) {
if (s.equals("android.nfc.tech.Ndef")) {
bNdefPresent = true;
break;
}
}
if (!bNdefPresent){
onUnexpectedAction(out, "Wrong Technology","termux API support only NFEF Tag");
if (!bNdefPresent) {
onUnexpectedAction(out, "Wrong Technology", "termux API support only NFEF Tag");
return;
}
NdefMessage[] nmsgs = new NdefMessage[msgs.length];
out.beginObject();
{
byte[] tagID = tag.getId();
StringBuilder sp = new StringBuilder();
for (byte tagIDpart : tagID) { sp.append(String.format("%02x", tagIDpart)); }
for (byte tagIDpart : tagID) {
sp.append(String.format("%02x", tagIDpart));
}
out.name("id").value(sp.toString());
out.name("typeTag").value(ndefTag.getType());
out.name("maxSize").value(ndefTag.getMaxSize());
Expand All @@ -295,10 +331,11 @@ public void readFullNDEFTag(Intent intent, JsonWriter out) throws Exception {
out.beginObject();
out.name("type").value(new String(record.getType()));
out.name("tnf").value(record.getTnf());
if (records[0].toUri() != null) out.name("URI").value(record.toUri().toString());
if (records[0].toUri() != null)
out.name("URI").value(record.toUri().toString());
out.name("mime").value(record.toMimeType());
int pos = 1 + record.getPayload()[0];
pos = (NdefRecord.TNF_WELL_KNOWN==record.getTnf())?(int)record.getPayload()[0]+1:0;
pos = (NdefRecord.TNF_WELL_KNOWN == record.getTnf()) ? (int) record.getPayload()[0] + 1 : 0;
int len = record.getPayload().length - pos;
byte[] msg = new byte[len];
System.arraycopy(record.getPayload(), pos, msg, 0, len);
Expand All @@ -313,7 +350,7 @@ public void readFullNDEFTag(Intent intent, JsonWriter out) throws Exception {
out.endObject();
}

protected void onUnexpectedAction(JsonWriter out,String error, String description) throws Exception {
protected void onUnexpectedAction(JsonWriter out, String error, String description) throws Exception {
out.beginObject();
out.name("error").value(error);
out.name("description").value(description);
Expand Down