post() {
    local endpoint="$1"
    local data="$2"

    local response=$(curl -X POST \
        -H "Authorization: token $GITHUB_TOKEN" \
        -H "Accept: application/vnd.github.v3+json" \
        -H "Content-Type: application/json" \
        "https://api.github.com/repos/gradle/gradle$endpoint" \
        -d "$data" \
        -w "\n%{http_code}" \
        2>/dev/null)

        .url("https://api.github.com/repos/square/okhttp/issues")
        .header("User-Agent", "OkHttp Headers.java")
        .addHeader("Accept", "application/json; q=0.5")
        .addHeader("Accept", "application/vnd.github.v3+json")
        .build()

    client.newCall(request).execute().use { response ->
      if (!response.isSuccessful) throw IOException("Unexpected code $response")

"text/html=html\napplication/msword=word\napplication/vnd.openxmlformats-officedocument.wordprocessingml.document=word\napplication/vnd.ms-excel=excel\napplication/vnd.ms-excel.sheet.2=excel\napplication/vnd.ms-excel.sheet.3=excel\napplication/vnd.ms-excel.sheet.4=excel\napplication/vnd.ms-excel.workspace.3=excel\napplication/vnd.ms-excel.workspace.4=excel\napplication/vnd.openxmlformats-officedocument.spreadsheetml.sheet=excel\napplication/vnd.ms-powerpoint=powerpoint\napplication/vnd.openxmlfor...

            assertEquals("application/pdf", mimeMap.getMimeType("pdf"));
            assertEquals("application/msword", mimeMap.getMimeType("doc"));
            assertEquals("application/vnd.ms-excel", mimeMap.getMimeType("xls"));
            assertEquals("text/html", mimeMap.getMimeType("html"));
            assertEquals("text/html", mimeMap.getMimeType("htm"));

        assertEquals("2", extractData.getValues("extended-properties:TotalTime")[0]);
        assertEquals("花子", extractData.getValues("extended-properties:Manager")[0]);
        assertEquals("application/vnd.openxmlformats-officedocument.wordprocessingml.document", extractData.getValues("Content-Type")[0]);
        assertEquals("さぶたいとる|たぐ", String.join("|", extractData.getValues("dc:subject")));

        .url("https://api.github.com/repos/square/okhttp/issues")
        .header("User-Agent", "OkHttp Headers.java")
        .addHeader("Accept", "application/json; q=0.5")
        .addHeader("Accept", "application/vnd.github.v3+json")
        .build();

    try (Response response = client.newCall(request).execute()) {
      if (!response.isSuccessful()) throw new IOException("Unexpected code " + response);

                response.setContentType("text/css");
            } else if (lowerPath.endsWith(".eot")) {
                response.setContentType("application/vnd.ms-fontobject");
            } else if (lowerPath.endsWith(".ico")) {
                response.setContentType("image/vnd.microsoft.icon");
            } else if (lowerPath.endsWith(".js")) {
                response.setContentType("text/javascript");

            .url("https://api.github.com/repos/square/okhttp/issues")
            .header("User-Agent", "OkHttp Headers.java")
            .addHeader("Accept", "application/json; q=0.5")
            .addHeader("Accept", "application/vnd.github.v3+json")
            .build()

        client.newCall(request).execute().use { response ->
          if (!response.isSuccessful) throw IOException("Unexpected code $response")

Backups are always a good precaution, particularly around upgrades, but this
upgrade has multiple known issues where the only remedy is to restore from
backup.

Also, please note:
- using `application/vnd.kubernetes.protobuf` as the media storage type for 1.6 is default but not required
- the ability to rollback to etcd2 can be preserved by setting the storage media type flag on `kube-apiserver`

  ```

    * If the serialization type is application/vnd.kubernetes.protobuf, and protobuf marshaling is not implemented for the requested API resource type, a '406 Not Acceptable is returned'.
    * If the serialization type is 'application/json':