# CORS (교차-출처 리소스 공유) { #cors-cross-origin-resource-sharing }

[CORS 또는 "Cross-Origin Resource Sharing"](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS)란, 브라우저에서 실행되는 프론트엔드에 백엔드와 통신하는 JavaScript 코드가 있고, 백엔드가 프론트엔드와 다른 "출처(origin)"에 있는 상황을 의미합니다.

## 출처 { #origin }

출처란 프로토콜(`http`, `https`), 도메인(`myapp.com`, `localhost`, `localhost.tiangolo.com`), 그리고 포트(`80`, `443`, `8080`)의 조합을 의미합니다.

따라서, 아래는 모두 상이한 출처입니다:

* `http://localhost`

                gitDir = dotGit;
            } else {
                // this is a git worktree, follow the pointer to the repository
                final Path workTree = Paths.get(readFirstLine(dotGit).substring("gitdir:".length()).trim());
                if (Files.exists(workTree) == false) {
                    return new GitInfo("unknown", "unknown");
                }
                head = workTree.resolve("HEAD");

  }

  private static void checkFromStringCase(
      String hpString,
      int defaultPort,
      @Nullable String expectHost,
      int expectPort,
      boolean expectHasExplicitPort) {
    HostAndPort hp;
    try {
      hp = HostAndPort.fromString(hpString);
    } catch (IllegalArgumentException e) {
      // Make sure we expected this.

        for (Map.Entry<String, String> additional : additionalLicenses.entrySet()) {
            String category = additional.getKey().substring(0, 5);
            String family = additional.getKey().substring(5);
            matchers.add(subStringMatcher(category, family, additional.getValue()));
        }

                    filterErrorsFound = true;
                    continue;
                }
                String packageName = fqcn.substring(0, lastDot);
                String className = fqcn.substring(lastDot + 1);
                LOGGER.info("IGNORING package: " + packageName + ", class: " + className);
                if (packageName.equals(lastPackageName) == false) {

        String myClasspathEntry = myResource.getPath();

        myClasspathEntry = myClasspathEntry.substring(0, myClasspathEntry.length() - (myResourcePath.length() + 2));

        if (myClasspathEntry.startsWith("file:")) {
            myClasspathEntry = myClasspathEntry.substring("file:".length());
        }

        URL docResource;
        try {

        if (s1 < 0 || s2 < 0) {
            log.error("Invalid UNC path " + path);
            return;
        }

        final String server = path.substring(1, s1).toLowerCase(Locale.ROOT);
        final String share = path.substring(s1 + 1, s2);
        String key = path.substring(0, dr.getPathConsumed()).toLowerCase(Locale.ROOT);

        final DfsReferralDataInternal dri = (DfsReferralDataInternal) dr;

            ZipEntry zipEntry
            while (zipEntry = zin.nextEntry) {
                String shortName = zipEntry.name
                if (shortName.contains('/')) {
                    shortName = shortName.substring(shortName.lastIndexOf('/') + 1)
                }
                if (shortName.endsWith('.jar')) {
                    def outputDir = shortName.startsWith('gradle-') ? gradleJars : dependencies

    val name = truncateName(subprojects.joinToString(","))

    private fun truncateName(str: String) =
        // Can't exceed Linux file name limit 255 char on TeamCity
        if (str.length > 200) {
            str.substring(0, 200) + "..."
        } else {
            str
        }

    override fun createFunctionalTestsFor(
        model: CIBuildModel,
        stage: Stage,
        testCoverage: TestCoverage,

  }

  private static void checkFromStringCase(
      String hpString,
      int defaultPort,
      @Nullable String expectHost,
      int expectPort,
      boolean expectHasExplicitPort) {
    HostAndPort hp;
    try {
      hp = HostAndPort.fromString(hpString);
    } catch (IllegalArgumentException e) {
      // Make sure we expected this.