fix: serialization of \n, \r and \t to Line Protocol

Author: bednar

CHANGELOG.md

@@ -1,5 +1,8 @@
 ## 1.10.0 [unreleased]
 
+### Bug Fixes
+1. [#129](https://github.com/influxdata/influxdb-client-java/pull/129): Fixed serialization of `\n`, `\r` and `\t` to Line Protocol 
+
 ### Dependencies
 
 1. [#124](https://github.com/influxdata/influxdb-client-java/pull/124): Update dependencies: akka: 2.6.6, commons-io: 2.7, spring: 5.2.7.RELEASE, retrofit: 2.9.0, okhttp3: 4.7.2

client/src/main/java/com/influxdb/client/write/Point.java

@@ -423,6 +423,15 @@ private void appendTime(@Nonnull final StringBuilder sb) {
     private void escapeKey(@Nonnull final StringBuilder sb, @Nonnull final String key) {
         for (int i = 0; i < key.length(); i++) {
             switch (key.charAt(i)) {
+                case '\n':
+                    sb.append("\\n");
+                    break;
+                case '\r':
+                    sb.append("\\r");
+                    break;
+                case '\t':
+                    sb.append("\\t");
+                    break;
                 case ' ':
                 case ',':
                 case '=':

client/src/test/java/com/influxdb/client/internal/MeasurementMapperTest.java

@@ -101,6 +101,17 @@ void instantOver2226() {
         Assertions.assertThat(mapper.toPoint(pojo, WritePrecision.NS).toLineProtocol()).isEqualTo("pojo,tag=value value=\"15\" 43658216763800123456");
     }
 
+    @Test
+    public void escapingTags() {
+
+        Pojo pojo = new Pojo();
+        pojo.tag = "mad\nrid";
+        pojo.value = 5;
+
+        String lineProtocol = mapper.toPoint(pojo, WritePrecision.S).toLineProtocol();
+        Assertions.assertThat(lineProtocol).isEqualTo("pojo,tag=mad\\nrid value=\"5\"");
+    }
+
     @Measurement(name = "pojo")
     private static class Pojo {
 

client/src/test/java/com/influxdb/client/write/PointTest.java

@@ -86,6 +86,20 @@ void tagEmptyValue() {
         Assertions.assertThat(point.toLineProtocol()).isEqualTo("h2o,location=europe level=2i");
     }
 
+    @Test
+    public void tagEscapingKeyAndValue() {
+
+        Point point = Point.measurement("h\n2\ro\t_data")
+                .addTag("new\nline", "new\nline")
+                .addTag("carriage\rreturn", "carriage\nreturn")
+                .addTag("carriage\rreturn", "carriage\nreturn")
+                .addTag("t\tab", "t\tab")
+                .addField("level", 2);
+
+        Assertions.assertThat(point.toLineProtocol())
+                .isEqualTo("h\\n2\\ro\\t_data,carriage\\rreturn=carriage\\nreturn,new\\nline=new\\nline,t\\tab=t\\tab level=2i");
+    }
+
     @Test
     void fieldTypes() {