Handle parsing batch replies which minimal responses.

A DELETE in a batch has no body, but it can also have very minimal headers,
ensure a reply where the batch only has a status line and one (or no) header
works correctly.

Fixes #378

Source/GTLRCore.xcodeproj/project.pbxproj

@@ -33,8 +33,6 @@
 		4F3E9C931C6C32B7004192DE /* Drive1BatchPaging2.response.txt in Resources */ = {isa = PBXBuildFile; fileRef = 4F3E9C8E1C6C32B7004192DE /* Drive1BatchPaging2.response.txt */; };
 		4F3E9C941C6C32B7004192DE /* Drive1BatchPaging3.response.txt in Resources */ = {isa = PBXBuildFile; fileRef = 4F3E9C8F1C6C32B7004192DE /* Drive1BatchPaging3.response.txt */; };
 		4F3E9C951C6C32B7004192DE /* Drive1BatchPaging3.response.txt in Resources */ = {isa = PBXBuildFile; fileRef = 4F3E9C8F1C6C32B7004192DE /* Drive1BatchPaging3.response.txt */; };
-		4F6F2E721C615492001065A5 /* Drive1BatchCorrupt.response.txt in Resources */ = {isa = PBXBuildFile; fileRef = 4F6F2E701C615492001065A5 /* Drive1BatchCorrupt.response.txt */; };
-		4F6F2E731C615492001065A5 /* Drive1BatchCorrupt.response.txt in Resources */ = {isa = PBXBuildFile; fileRef = 4F6F2E701C615492001065A5 /* Drive1BatchCorrupt.response.txt */; };
 		4F6F2E7A1C6154AA001065A5 /* Drive1Corrupt.response.txt in Resources */ = {isa = PBXBuildFile; fileRef = 4F6F2E771C6154AA001065A5 /* Drive1Corrupt.response.txt */; };
 		4F6F2E7B1C6154AA001065A5 /* Drive1Corrupt.response.txt in Resources */ = {isa = PBXBuildFile; fileRef = 4F6F2E771C6154AA001065A5 /* Drive1Corrupt.response.txt */; };
 		4F934E671512712100C4EA34 /* GTLRBase64.h in Headers */ = {isa = PBXBuildFile; fileRef = 4F934E651512712100C4EA34 /* GTLRBase64.h */; settings = {ATTRIBUTES = (Public, ); }; };
@@ -389,6 +387,11 @@
 		F4D9D52A1D833D7C000EBBED /* GTLRDuration.m in Sources */ = {isa = PBXBuildFile; fileRef = F4D9D51E1D832DB5000EBBED /* GTLRDuration.m */; };
 		F4D9D52B1D833D7C000EBBED /* GTLRDuration.m in Sources */ = {isa = PBXBuildFile; fileRef = F4D9D51E1D832DB5000EBBED /* GTLRDuration.m */; };
 		F4D9D52C1D833D7D000EBBED /* GTLRDuration.m in Sources */ = {isa = PBXBuildFile; fileRef = F4D9D51E1D832DB5000EBBED /* GTLRDuration.m */; };
+		F4F2CFDA24A6530900F1B3A7 /* NoPayloadsBatch.response.txt in Resources */ = {isa = PBXBuildFile; fileRef = F4F2CFD924A6530900F1B3A7 /* NoPayloadsBatch.response.txt */; };
+		F4F2CFDB24A6530900F1B3A7 /* NoPayloadsBatch.response.txt in Resources */ = {isa = PBXBuildFile; fileRef = F4F2CFD924A6530900F1B3A7 /* NoPayloadsBatch.response.txt */; };
+		F4F2CFDC24A6530900F1B3A7 /* NoPayloadsBatch.response.txt in Resources */ = {isa = PBXBuildFile; fileRef = F4F2CFD924A6530900F1B3A7 /* NoPayloadsBatch.response.txt */; };
+		F4F2CFDD24A6674B00F1B3A7 /* Drive1BatchCorrupt.response.txt in Resources */ = {isa = PBXBuildFile; fileRef = F4ACE7E91DAD217700053F91 /* Drive1BatchCorrupt.response.txt */; };
+		F4F2CFDE24A6674C00F1B3A7 /* Drive1BatchCorrupt.response.txt in Resources */ = {isa = PBXBuildFile; fileRef = F4ACE7E91DAD217700053F91 /* Drive1BatchCorrupt.response.txt */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -421,7 +424,6 @@
 		4F3E9C8D1C6C32B7004192DE /* Drive1BatchPaging1.response.txt */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; name = Drive1BatchPaging1.response.txt; path = Tests/Data/Drive1BatchPaging1.response.txt; sourceTree = "<group>"; };
 		4F3E9C8E1C6C32B7004192DE /* Drive1BatchPaging2.response.txt */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; name = Drive1BatchPaging2.response.txt; path = Tests/Data/Drive1BatchPaging2.response.txt; sourceTree = "<group>"; };
 		4F3E9C8F1C6C32B7004192DE /* Drive1BatchPaging3.response.txt */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; name = Drive1BatchPaging3.response.txt; path = Tests/Data/Drive1BatchPaging3.response.txt; sourceTree = "<group>"; };
-		4F6F2E701C615492001065A5 /* Drive1BatchCorrupt.response.txt */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; name = Drive1BatchCorrupt.response.txt; path = Tests/Data/Drive1BatchCorrupt.response.txt; sourceTree = "<group>"; };
 		4F6F2E771C6154AA001065A5 /* Drive1Corrupt.response.txt */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; name = Drive1Corrupt.response.txt; path = Tests/Data/Drive1Corrupt.response.txt; sourceTree = "<group>"; };
 		4F934E651512712100C4EA34 /* GTLRBase64.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = GTLRBase64.h; path = Utilities/GTLRBase64.h; sourceTree = "<group>"; };
 		4F934E661512712100C4EA34 /* GTLRBase64.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = GTLRBase64.m; path = Utilities/GTLRBase64.m; sourceTree = "<group>"; };
@@ -514,6 +516,7 @@
 		F4D9D51D1D832DB5000EBBED /* GTLRDuration.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; name = GTLRDuration.h; path = Objects/GTLRDuration.h; sourceTree = "<group>"; };
 		F4D9D51E1D832DB5000EBBED /* GTLRDuration.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = GTLRDuration.m; path = Objects/GTLRDuration.m; sourceTree = "<group>"; };
 		F4D9D5251D833D5D000EBBED /* GTLRDurationTest.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = GTLRDurationTest.m; path = Tests/GTLRDurationTest.m; sourceTree = "<group>"; };
+		F4F2CFD924A6530900F1B3A7 /* NoPayloadsBatch.response.txt */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; name = NoPayloadsBatch.response.txt; path = Tests/Data/NoPayloadsBatch.response.txt; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -615,7 +618,6 @@
 				089C1671FE841209C02AAC07 /* Frameworks and Libraries */,
 				19C28FB8FE9D52D311CA2CBB /* Products */,
 				F4A872741DAD1ED800D69E09 /* Frameworks */,
-				34AF73421FB4E3C80022335F /* Recovered References */,
 			);
 			name = GoogleBundle;
 			sourceTree = "<group>";
@@ -678,14 +680,6 @@
 			name = "GTLR Source";
 			sourceTree = "<group>";
 		};
-		34AF73421FB4E3C80022335F /* Recovered References */ = {
-			isa = PBXGroup;
-			children = (
-				4F6F2E701C615492001065A5 /* Drive1BatchCorrupt.response.txt */,
-			);
-			name = "Recovered References";
-			sourceTree = "<group>";
-		};
 		4F346DD20D7500C9006033E0 /* Common */ = {
 			isa = PBXGroup;
 			children = (
@@ -818,6 +812,7 @@
 				4FA824881C6BDAC700E11CCC /* Drive1Paging3.response.txt */,
 				4F3AA9161C600013008497BC /* Drive1ParamError.response.txt */,
 				F4A07B1B1E4293990035678A /* Drive1ParamErrorAsList.response.txt */,
+				F4F2CFD924A6530900F1B3A7 /* NoPayloadsBatch.response.txt */,
 				F4469DFE1C45757E00BCFAA1 /* URITemplateExtraTests.json */,
 				F4469DFF1C45757E00BCFAA1 /* URITemplateRFCTests.json */,
 			);
@@ -1188,6 +1183,7 @@
 				F4469E051C45758700BCFAA1 /* URITemplateRFCTests.json in Resources */,
 				F4469E041C45758700BCFAA1 /* URITemplateExtraTests.json in Resources */,
 				4F3AA91A1C600013008497BC /* Drive1ParamError.response.txt in Resources */,
+				F4F2CFDA24A6530900F1B3A7 /* NoPayloadsBatch.response.txt in Resources */,
 				4F3E9C931C6C32B7004192DE /* Drive1BatchPaging2.response.txt in Resources */,
 				4F3E9C811C6C12A1004192DE /* Classroom1NotFoundError.response.txt in Resources */,
 				4F3E9C911C6C32B7004192DE /* Drive1BatchPaging1.response.txt in Resources */,
@@ -1196,10 +1192,10 @@
 				4FA8248E1C6BDAC700E11CCC /* Drive1Paging3.response.txt in Resources */,
 				F4A07B1F1E4293A10035678A /* Drive1ParamErrorAsList.response.txt in Resources */,
 				4F3AA9181C600013008497BC /* Drive1AuthError.response.txt in Resources */,
-				4F6F2E731C615492001065A5 /* Drive1BatchCorrupt.response.txt in Resources */,
 				4FA8248A1C6BDAC700E11CCC /* Drive1Paging1.response.txt in Resources */,
 				4F6F2E7B1C6154AA001065A5 /* Drive1Corrupt.response.txt in Resources */,
 				4F2591411C5C3338009E0240 /* Drive1.response.txt in Resources */,
+				F4F2CFDE24A6674C00F1B3A7 /* Drive1BatchCorrupt.response.txt in Resources */,
 				4FA8248C1C6BDAC700E11CCC /* Drive1Paging2.response.txt in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -1219,6 +1215,7 @@
 				F4469E031C45758600BCFAA1 /* URITemplateRFCTests.json in Resources */,
 				4F3AA9191C600013008497BC /* Drive1ParamError.response.txt in Resources */,
 				F4469E021C45758600BCFAA1 /* URITemplateExtraTests.json in Resources */,
+				F4F2CFDB24A6530900F1B3A7 /* NoPayloadsBatch.response.txt in Resources */,
 				4F3E9C921C6C32B7004192DE /* Drive1BatchPaging2.response.txt in Resources */,
 				4F3E9C801C6C12A1004192DE /* Classroom1NotFoundError.response.txt in Resources */,
 				4F3E9C901C6C32B7004192DE /* Drive1BatchPaging1.response.txt in Resources */,
@@ -1227,10 +1224,10 @@
 				4FA8248D1C6BDAC700E11CCC /* Drive1Paging3.response.txt in Resources */,
 				F4A07B201E4293A20035678A /* Drive1ParamErrorAsList.response.txt in Resources */,
 				4F3AA9171C600013008497BC /* Drive1AuthError.response.txt in Resources */,
-				4F6F2E721C615492001065A5 /* Drive1BatchCorrupt.response.txt in Resources */,
 				4FA824891C6BDAC700E11CCC /* Drive1Paging1.response.txt in Resources */,
 				4F6F2E7A1C6154AA001065A5 /* Drive1Corrupt.response.txt in Resources */,
 				4F2591401C5C3338009E0240 /* Drive1.response.txt in Resources */,
+				F4F2CFDD24A6674B00F1B3A7 /* Drive1BatchCorrupt.response.txt in Resources */,
 				4FA8248B1C6BDAC700E11CCC /* Drive1Paging2.response.txt in Resources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -1256,6 +1253,7 @@
 				F4ACE7DA1DAD20E100053F91 /* Classroom1NotFoundError.response.txt in Resources */,
 				F4ACE7DF1DAD20E100053F91 /* Drive1BatchPaging3.response.txt in Resources */,
 				F4ACE7E61DAD20E100053F91 /* Drive1Paging3.response.txt in Resources */,
+				F4F2CFDC24A6530900F1B3A7 /* NoPayloadsBatch.response.txt in Resources */,
 				F4ACE7E41DAD20E100053F91 /* Drive1Paging1.response.txt in Resources */,
 				F4ACE7E31DAD20E100053F91 /* Drive1Corrupt.response.txt in Resources */,
 				F4ACE7E51DAD20E100053F91 /* Drive1Paging2.response.txt in Resources */,

Source/Objects/GTLRService.m

@@ -1566,32 +1566,43 @@ - (GTLRBatchResponsePart *)responsePartWithMIMEPart:(GTMMIMEDocumentPart *)mimeP
                     targetBytes:"\r\n"
                    targetLength:2
                    foundOffsets:&offsets];
-    if (offsets.count < 2) {
-      // Lack of status line and inner headers is strange, but not fatal since
-      // if the JSON was delivered.
-      GTLR_DEBUG_LOG(@"GTLRService: Batch result cannot parse headers for request %@:\n%@",
-                     responseContentID,
-                     [[NSString alloc] initWithData:innerHeaderData
-                                           encoding:NSUTF8StringEncoding]);
-    } else {
-      NSString *statusString;
-      NSInteger statusCode;
-      [self getResponseLineFromData:innerHeaderData
-                         statusCode:&statusCode
-                       statusString:&statusString];
-      responsePart.statusCode = statusCode;
-      responsePart.statusString = statusString;
+    NSData *statusLine;
+    NSData *actualInnerHeaderData;
+    if (offsets.count) {
+      NSRange statusRange = NSMakeRange(0, offsets[0].unsignedIntegerValue);
+      statusLine = [innerHeaderData subdataWithRange:statusRange];
 
       NSUInteger actualInnerHeaderOffset = offsets[0].unsignedIntegerValue + 2;
-      NSData *actualInnerHeaderData;
       if (innerHeaderData.length - actualInnerHeaderOffset > 0) {
         NSRange actualInnerHeaderRange =
             NSMakeRange(actualInnerHeaderOffset,
                         innerHeaderData.length - actualInnerHeaderOffset);
         actualInnerHeaderData = [innerHeaderData subdataWithRange:actualInnerHeaderRange];
       }
-      responsePart.headers = [GTMMIMEDocument headersWithData:actualInnerHeaderData];
+    } else {
+      // There appears to only be a status line.
+      //
+      // This means there were no reponse headers. "Date" seems like it should
+      // be required, but https://tools.ietf.org/html/rfc7231#section-7.1.1.2
+      // lets even that be left off if a server doesn't have a clock it knows
+      // to be correct.
+      statusLine = innerHeaderData;
+    }
+
+    NSString *httpVersion;
+    NSString *statusString;
+    NSInteger statusCode;
+    [self getResponseLineFromData:statusLine
+                      httpVersion:&httpVersion
+                       statusCode:&statusCode
+                     statusString:&statusString];
+    if (![httpVersion hasPrefix:@"HTTP/"]) {
+      GTLR_DEBUG_LOG(@"GTLRService: Batch result didn't have a standard HTTP Version: %@",
+                     httpVersion);
     }
+    responsePart.statusCode = statusCode;
+    responsePart.statusString = statusString;
+    responsePart.headers = [GTMMIMEDocument headersWithData:actualInnerHeaderData];
 
     // Create JSON from the body.
     // (if there is any, methods like delete return nothing)
@@ -1624,11 +1635,13 @@ - (GTLRBatchResponsePart *)responsePartWithMIMEPart:(GTMMIMEDocumentPart *)mimeP
 }
 
 - (void)getResponseLineFromData:(NSData *)data
+                    httpVersion:(NSString **)outHTTPVersion
                      statusCode:(NSInteger *)outStatusCode
                    statusString:(NSString **)outStatusString {
   // Sample response line:
   //   HTTP/1.1 200 OK
 
+  *outHTTPVersion = @"???";
   *outStatusCode = -1;
   *outStatusString = @"???";
   NSString *responseLine = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
@@ -1639,8 +1652,7 @@ - (void)getResponseLineFromData:(NSData *)data
   // scan.
   NSCharacterSet *wsSet = [NSCharacterSet whitespaceAndNewlineCharacterSet];
   NSCharacterSet *newlineSet = [NSCharacterSet newlineCharacterSet];
-  NSString *httpVersion;
-  if ([scanner scanUpToCharactersFromSet:wsSet intoString:&httpVersion]
+  if ([scanner scanUpToCharactersFromSet:wsSet intoString:outHTTPVersion]
       && [scanner scanInteger:outStatusCode]
       && [scanner scanUpToCharactersFromSet:newlineSet intoString:outStatusString]) {
     // Got it all.

Source/Tests/Data/NoPayloadsBatch.response.txt

@@ -0,0 +1,16 @@
+--batch_hXL_3_UnLsQ_AAYW6kQ4LYU
+Content-Type: application/http
+Content-ID: response-gtlr_39
+
+HTTP/1.1 204 No Content
+Date: Wed, 24 Jun 2020 09:21:24 GMT
+
+
+--batch_hXL_3_UnLsQ_AAYW6kQ4LYU
+Content-Type: application/http
+Content-ID: response-gtlr_40
+
+HTTP/1.1 204 No Content
+
+
+--batch_hXL_3_UnLsQ_AAYW6kQ4LYU

Source/Tests/GTLRServiceTest.m

@@ -56,7 +56,10 @@ @implementation GTLRTestingSvc_FileList_Surrogate2
 // Internal methods redeclared for testing.
 
 @interface GTLRBatchResponsePart : NSObject
+@property(nonatomic, assign) NSInteger statusCode;
+@property(nonatomic, copy) NSString *statusString;
 @property(nonatomic, strong) NSDictionary *headers;
+@property(nonatomic, strong) NSError *parseError;
 @end
 
 @interface GTLRService (InternalMethods)
@@ -147,7 +150,8 @@ + (NSData *)dataForTestFileName:(NSString *)fileName {
   "  \"Drive1Empty.response.txt\": \"ewp9Cg==\","\
   "  \"Drive1Batch.response.txt\": \"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\","\
   "  \"Drive1Corrupt.response.txt\": \"eyBhYmMgOjo9PSB9Cg==\","\
-  "  \"Drive1Paging3.response.txt\": \"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\""\
+  "  \"Drive1Paging3.response.txt\": \"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\","\
+  "  \"NoPayloadsBatch.response.txt\": \"LS1iYXRjaF9oWExfM19VbkxzUV9BQVlXNmtRNExZVQ0KQ29udGVudC1UeXBlOiBhcHBsaWNhdGlvbi9odHRwDQpDb250ZW50LUlEOiByZXNwb25zZS1ndGxyXzM5DQoNCkhUVFAvMS4xIDIwNCBObyBDb250ZW50DQpEYXRlOiBXZWQsIDI0IEp1biAyMDIwIDA5OjIxOjI0IEdNVA0KDQoNCi0tYmF0Y2hfaFhMXzNfVW5Mc1FfQUFZVzZrUTRMWVUNCkNvbnRlbnQtVHlwZTogYXBwbGljYXRpb24vaHR0cA0KQ29udGVudC1JRDogcmVzcG9uc2UtZ3Rscl80MA0KDQpIVFRQLzEuMSAyMDQgTm8gQ29udGVudA0KDQoNCi0tYmF0Y2hfaFhMXzNfVW5Mc1FfQUFZVzZrUTRMWVUNCg==\""\
   "}";
 
   static dispatch_once_t onceToken;
@@ -1712,6 +1716,37 @@ - (void)performBatchQueryTestSkippingAuthorization:(BOOL)shouldSkipAuthorization
                          expectedExpirations:0];
 }
 
+- (void)testParsingMinimalBatchReplies {
+  // Deletes in a batch have no payload, ensure parsing works as expected.
+
+  NSData *responseData =
+      [[self class] dataForTestFileName:@"NoPayloadsBatch.response.txt"];;
+  XCTAssertNotNil(responseData);
+
+  GTLRService *service = [self driveServiceForTest];
+
+  NSArray *mimeParts =
+      [GTMMIMEDocument MIMEPartsWithBoundary:@"batch_hXL_3_UnLsQ_AAYW6kQ4LYU"
+                                        data:responseData];
+  XCTAssertNotNil(mimeParts);
+  XCTAssertEqual(mimeParts.count, 2U);
+
+  GTLRBatchResponsePart *part0 = [service responsePartWithMIMEPart:mimeParts[0]];
+  XCTAssertNotNil(part0);
+  XCTAssertEqual(part0.statusCode, 204);
+  XCTAssertEqualObjects(part0.statusString, @"No Content");
+  XCTAssertEqual(part0.headers.count, 1U);
+  XCTAssertEqualObjects(part0.headers[@"Date"], @"Wed, 24 Jun 2020 09:21:24 GMT");
+  XCTAssertNil(part0.parseError);
+
+  GTLRBatchResponsePart *part1 = [service responsePartWithMIMEPart:mimeParts[1]];
+  XCTAssertNotNil(part1);
+  XCTAssertEqual(part1.statusCode, 204);
+  XCTAssertEqualObjects(part1.statusString, @"No Content");
+  XCTAssertEqual(part1.headers.count, 0U);
+  XCTAssertNil(part1.parseError);
+}
+
 - (GTMSessionFetcherTestBlock)fetcherTestBlockForBatchPaging {
   __block int pageCounter = 0;