image-loader add datauri parser
This commit is contained in:
Dimitry Ivanov
parent
9d80637035
commit
c57d06dc7d
@ -27,6 +27,11 @@ dependencies {
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api it['android-gif']
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api it['okhttp']
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}
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deps['test'].with {
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testImplementation it['junit']
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testImplementation it['robolectric']
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}
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}
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afterEvaluate {
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@ -0,0 +1,60 @@
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package ru.noties.markwon.il;
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import android.support.annotation.Nullable;
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public class DataUri {
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private final String contentType;
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private final boolean base64;
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private final String data;
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public DataUri(@Nullable String contentType, boolean base64, @Nullable String data) {
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this.contentType = contentType;
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this.base64 = base64;
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this.data = data;
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}
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@Nullable
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public String contentType() {
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return contentType;
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}
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public boolean base64() {
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return base64;
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}
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@Nullable
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public String data() {
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return data;
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}
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@Override
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public String toString() {
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return "DataUri{" +
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"contentType='" + contentType + '\'' +
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", base64=" + base64 +
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", data='" + data + '\'' +
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'}';
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}
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@Override
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public boolean equals(Object o) {
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if (this == o) return true;
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if (o == null || getClass() != o.getClass()) return false;
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DataUri dataUri = (DataUri) o;
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if (base64 != dataUri.base64) return false;
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if (contentType != null ? !contentType.equals(dataUri.contentType) : dataUri.contentType != null)
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return false;
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return data != null ? data.equals(dataUri.data) : dataUri.data == null;
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}
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@Override
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public int hashCode() {
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int result = contentType != null ? contentType.hashCode() : 0;
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result = 31 * result + (base64 ? 1 : 0);
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result = 31 * result + (data != null ? data.hashCode() : 0);
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return result;
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}
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}
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@ -0,0 +1,79 @@
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package ru.noties.markwon.il;
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import android.support.annotation.NonNull;
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import android.support.annotation.Nullable;
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public abstract class DataUriParser {
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@Nullable
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public abstract DataUri parse(@NonNull String input);
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@NonNull
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public static DataUriParser create() {
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return new Impl();
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}
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static class Impl extends DataUriParser {
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@Nullable
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@Override
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public DataUri parse(@NonNull String input) {
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final int index = input.indexOf(',');
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// we expect exactly one comma
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if (index < 0) {
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return null;
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}
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final String contentType;
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final boolean base64;
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if (index > 0) {
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final String part = input.substring(0, index);
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final String[] parts = part.split(";");
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final int length = parts.length;
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if (length > 0) {
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// if one: either content-type or base64
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if (length == 1) {
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final String value = parts[0];
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if ("base64".equals(value)) {
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contentType = null;
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base64 = true;
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} else {
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contentType = value.indexOf('/') > -1
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? value
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: null;
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base64 = false;
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}
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} else {
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contentType = parts[0].indexOf('/') > -1
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? parts[0]
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: null;
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base64 = "base64".equals(parts[length - 1]);
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}
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} else {
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contentType = null;
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base64 = false;
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}
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} else {
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contentType = null;
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base64 = false;
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}
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final String data;
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if (index < input.length()) {
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final String value = input.substring(index + 1, input.length()).replaceAll("\n", "");
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if (value.length() == 0) {
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data = null;
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} else {
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data = value;
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}
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} else {
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data = null;
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}
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return new DataUri(contentType, base64, data);
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}
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}
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}
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@ -0,0 +1,119 @@
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package ru.noties.markwon.il;
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import org.junit.Before;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.robolectric.RobolectricTestRunner;
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import org.robolectric.annotation.Config;
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import java.util.LinkedHashMap;
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import java.util.Map;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertNull;
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@RunWith(RobolectricTestRunner.class)
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@Config(manifest = Config.NONE)
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public class DataUriParserTest {
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private DataUriParser.Impl impl;
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@Before
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public void before() {
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impl = new DataUriParser.Impl();
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}
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@Test
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public void test() {
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final Map<String, DataUri> data = new LinkedHashMap<String, DataUri>() {{
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put(",", new DataUri(null, false, null));
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put("image/svg+xml;base64,!@#$%^&*(", new DataUri("image/svg+xml", true, "!@#$%^&*("));
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put("text/vnd-example+xyz;foo=bar;base64,R0lGODdh", new DataUri("text/vnd-example+xyz", true, "R0lGODdh"));
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put("text/plain;charset=UTF-8;page=21,the%20data:1234,5678", new DataUri("text/plain", false, "the%20data:1234,5678"));
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}};
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for (Map.Entry<String, DataUri> entry : data.entrySet()) {
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assertEquals(entry.getKey(), entry.getValue(), impl.parse(entry.getKey()));
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}
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}
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@Test
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public void data_new_lines_are_ignored() {
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final String input = "image/png;base64,iVBORw0KGgoAAA\n" +
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"ANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4\n" +
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"//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU\n" +
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"5ErkJggg==";
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assertEquals(
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new DataUri("image/png", true, "iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=="),
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impl.parse(input)
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);
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}
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@Test
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public void no_comma_returns_null() {
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final String[] inputs = {
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"",
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"what-ever",
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";;;;;;;",
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"some crazy data"
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};
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for (String input : inputs) {
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assertNull(input, impl.parse(input));
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}
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}
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@Test
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public void two_commas() {
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final String input = ",,"; // <- second one would be considered data...
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assertEquals(
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input,
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new DataUri(null, false, ","),
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impl.parse(input)
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);
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}
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@Test
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public void more_commas() {
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final String input = "first,second,third"; // <- first is just a value (will be ignored)
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assertEquals(
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input,
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new DataUri(null, false, "second,third"),
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impl.parse(input)
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);
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}
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@Test
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public void base64_no_content_type() {
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final String input = ";base64,12345";
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assertEquals(
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input,
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new DataUri(null, true, "12345"),
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impl.parse(input)
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);
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}
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@Test
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public void not_base64_no_content_type() {
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final String input = ",qweRTY";
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assertEquals(
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input,
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new DataUri(null, false, "qweRTY"),
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impl.parse(input)
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);
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}
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@Test
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public void content_type_data_no_base64() {
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final String input = "image/png,aSdFg";
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assertEquals(
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input,
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new DataUri("image/png", false, "aSdFg"),
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impl.parse(input)
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);
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}
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}
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