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Add utility to create Session from http request
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presto-main/src/main/java/com/facebook/presto/server/ResourceUtil.java
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| /* | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http:https://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package com.facebook.presto.server; | ||
|
|
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| import com.facebook.presto.Session; | ||
| import com.facebook.presto.Session.SessionBuilder; | ||
| import com.facebook.presto.spi.type.TimeZoneKey; | ||
| import com.facebook.presto.spi.type.TimeZoneNotSupportedException; | ||
|
|
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| import javax.servlet.http.HttpServletRequest; | ||
| import javax.ws.rs.WebApplicationException; | ||
| import javax.ws.rs.core.MediaType; | ||
| import javax.ws.rs.core.Response; | ||
| import javax.ws.rs.core.Response.Status; | ||
|
|
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| import java.util.Locale; | ||
|
|
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| import static com.facebook.presto.client.PrestoHeaders.PRESTO_CATALOG; | ||
| import static com.facebook.presto.client.PrestoHeaders.PRESTO_LANGUAGE; | ||
| import static com.facebook.presto.client.PrestoHeaders.PRESTO_SCHEMA; | ||
| import static com.facebook.presto.client.PrestoHeaders.PRESTO_SOURCE; | ||
| import static com.facebook.presto.client.PrestoHeaders.PRESTO_TIME_ZONE; | ||
| import static com.facebook.presto.client.PrestoHeaders.PRESTO_USER; | ||
| import static com.google.common.base.Strings.isNullOrEmpty; | ||
| import static com.google.common.net.HttpHeaders.USER_AGENT; | ||
| import static java.lang.String.format; | ||
|
|
||
| final class ResourceUtil | ||
| { | ||
| private ResourceUtil() | ||
| { | ||
| } | ||
|
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| public static Session createSessionForRequest(HttpServletRequest servletRequest) | ||
| { | ||
| SessionBuilder sessionBuilder = Session.builder() | ||
| .setUser(getRequiredHeader(servletRequest, PRESTO_USER, "User")) | ||
| .setSource(servletRequest.getHeader(PRESTO_SOURCE)) | ||
| .setCatalog(getRequiredHeader(servletRequest, PRESTO_CATALOG, "Catalog")) | ||
| .setSchema(getRequiredHeader(servletRequest, PRESTO_SCHEMA, "Schema")) | ||
| .setRemoteUserAddress(servletRequest.getRemoteAddr()) | ||
| .setUserAgent(servletRequest.getHeader(USER_AGENT)); | ||
|
|
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| String timeZoneId = servletRequest.getHeader(PRESTO_TIME_ZONE); | ||
| if (timeZoneId != null) { | ||
| sessionBuilder.setTimeZoneKey(getTimeZoneKey(timeZoneId)); | ||
| } | ||
|
|
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| String language = servletRequest.getHeader(PRESTO_LANGUAGE); | ||
| if (language != null) { | ||
| sessionBuilder.setLocale(Locale.forLanguageTag(language)); | ||
| } | ||
|
|
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| return sessionBuilder.build(); | ||
| } | ||
|
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| private static String getRequiredHeader(HttpServletRequest servletRequest, String name, String description) | ||
| { | ||
| String user = servletRequest.getHeader(name); | ||
| assertRequest(!isNullOrEmpty(user), description + " (%s) is empty", PRESTO_USER); | ||
| return user; | ||
| } | ||
|
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| public static void assertRequest(boolean expression, String format, Object... args) | ||
| { | ||
| if (!expression) { | ||
| throw badRequest(format(format, args)); | ||
| } | ||
| } | ||
|
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| private static TimeZoneKey getTimeZoneKey(String timeZoneId) | ||
| { | ||
| try { | ||
| return TimeZoneKey.getTimeZoneKey(timeZoneId); | ||
| } | ||
| catch (TimeZoneNotSupportedException e) { | ||
| throw badRequest(e.getMessage()); | ||
| } | ||
| } | ||
|
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| private static WebApplicationException badRequest(String message) | ||
| { | ||
| throw new WebApplicationException(Response | ||
| .status(Status.BAD_REQUEST) | ||
| .type(MediaType.TEXT_PLAIN) | ||
| .entity(message) | ||
| .build()); | ||
| } | ||
| } |
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