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8 | #import "RCTBlobManager.h"
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9 |
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10 | #import <mutex>
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11 |
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12 | #import <React/RCTConvert.h>
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13 | #import <React/RCTNetworking.h>
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14 | #import <React/RCTUtils.h>
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15 | #import <React/RCTWebSocketModule.h>
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16 |
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17 | static NSString *const kBlobURIScheme = @"blob";
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18 |
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19 | @interface RCTBlobManager () <RCTNetworkingRequestHandler, RCTNetworkingResponseHandler, RCTWebSocketContentHandler>
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20 |
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21 | @end
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22 |
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23 | @implementation RCTBlobManager
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24 | {
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25 |
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26 |
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27 | NSMutableDictionary<NSString *, NSData *> *_blobs;
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28 | std::mutex _blobsMutex;
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29 |
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30 | NSOperationQueue *_queue;
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31 | }
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32 |
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33 | RCT_EXPORT_MODULE(BlobModule)
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34 |
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35 | @synthesize bridge = _bridge;
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36 |
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37 | - (void)setBridge:(RCTBridge *)bridge
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38 | {
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39 | _bridge = bridge;
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40 |
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41 | std::lock_guard<std::mutex> lock(_blobsMutex);
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42 | _blobs = [NSMutableDictionary new];
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43 | }
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44 |
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45 | + (BOOL)requiresMainQueueSetup
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46 | {
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47 | return NO;
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48 | }
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49 |
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50 | - (NSDictionary<NSString *, id> *)constantsToExport
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51 | {
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52 | return [self getConstants];
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53 | }
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54 |
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55 | - (NSDictionary<NSString *, id> *)getConstants
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56 | {
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57 | return @{
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58 | @"BLOB_URI_SCHEME": kBlobURIScheme,
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59 | @"BLOB_URI_HOST": [NSNull null],
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60 | };
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61 | }
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62 |
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63 | - (NSString *)store:(NSData *)data
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64 | {
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65 | NSString *blobId = [NSUUID UUID].UUIDString;
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66 | [self store:data withId:blobId];
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67 | return blobId;
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68 | }
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69 |
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70 | - (void)store:(NSData *)data withId:(NSString *)blobId
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71 | {
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72 | std::lock_guard<std::mutex> lock(_blobsMutex);
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73 | _blobs[blobId] = data;
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74 | }
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75 |
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76 | - (NSData *)resolve:(NSDictionary<NSString *, id> *)blob
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77 | {
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78 | NSString *blobId = [RCTConvert NSString:blob[@"blobId"]];
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79 | NSNumber *offset = [RCTConvert NSNumber:blob[@"offset"]];
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80 | NSNumber *size = [RCTConvert NSNumber:blob[@"size"]];
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81 | return [self resolve:blobId
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82 | offset:offset ? [offset integerValue] : 0
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83 | size:size ? [size integerValue] : -1];
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84 | }
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85 |
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86 | - (NSData *)resolve:(NSString *)blobId offset:(NSInteger)offset size:(NSInteger)size
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87 | {
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88 | NSData *data;
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89 | {
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90 | std::lock_guard<std::mutex> lock(_blobsMutex);
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91 | data = _blobs[blobId];
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92 | }
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93 | if (!data) {
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94 | return nil;
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95 | }
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96 | if (offset != 0 || (size != -1 && size != data.length)) {
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97 | data = [data subdataWithRange:NSMakeRange(offset, size)];
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98 | }
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99 | return data;
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100 | }
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101 |
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102 | - (NSData *)resolveURL:(NSURL *)url
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103 | {
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104 | NSURLComponents *components = [[NSURLComponents alloc] initWithURL:url resolvingAgainstBaseURL:NO];
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105 |
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106 | NSString *blobId = components.path;
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107 | NSInteger offset = 0;
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108 | NSInteger size = -1;
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109 |
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110 | if (components.queryItems) {
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111 | for (NSURLQueryItem *queryItem in components.queryItems) {
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112 | if ([queryItem.name isEqualToString:@"offset"]) {
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113 | offset = [queryItem.value integerValue];
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114 | }
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115 | if ([queryItem.name isEqualToString:@"size"]) {
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116 | size = [queryItem.value integerValue];
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117 | }
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118 | }
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119 | }
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120 |
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121 | if (blobId) {
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122 | return [self resolve:blobId offset:offset size:size];
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123 | }
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124 | return nil;
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125 | }
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126 |
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127 | - (void)remove:(NSString *)blobId
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128 | {
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129 | std::lock_guard<std::mutex> lock(_blobsMutex);
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130 | [_blobs removeObjectForKey:blobId];
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131 | }
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132 |
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133 | RCT_EXPORT_METHOD(addNetworkingHandler)
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134 | {
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135 | dispatch_async(_bridge.networking.methodQueue, ^{
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136 | [self->_bridge.networking addRequestHandler:self];
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137 | [self->_bridge.networking addResponseHandler:self];
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138 | });
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139 | }
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140 |
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141 | RCT_EXPORT_METHOD(addWebSocketHandler:(nonnull NSNumber *)socketID)
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142 | {
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143 | dispatch_async(_bridge.webSocketModule.methodQueue, ^{
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144 | [self->_bridge.webSocketModule setContentHandler:self forSocketID:socketID];
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145 | });
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146 | }
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147 |
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148 | RCT_EXPORT_METHOD(removeWebSocketHandler:(nonnull NSNumber *)socketID)
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149 | {
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150 | dispatch_async(_bridge.webSocketModule.methodQueue, ^{
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151 | [self->_bridge.webSocketModule setContentHandler:nil forSocketID:socketID];
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152 | });
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153 | }
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154 |
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155 |
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156 | RCT_EXPORT_METHOD(sendOverSocket:(NSDictionary *)blob socketID:(nonnull NSNumber *)socketID)
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157 | {
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158 | dispatch_async(_bridge.webSocketModule.methodQueue, ^{
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159 | [self->_bridge.webSocketModule sendData:[self resolve:blob] forSocketID:socketID];
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160 | });
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161 | }
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162 |
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163 | RCT_EXPORT_METHOD(createFromParts:(NSArray<NSDictionary<NSString *, id> *> *)parts withId:(NSString *)blobId)
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164 | {
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165 | NSMutableData *data = [NSMutableData new];
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166 | for (NSDictionary<NSString *, id> *part in parts) {
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167 | NSString *type = [RCTConvert NSString:part[@"type"]];
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168 |
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169 | if ([type isEqualToString:@"blob"]) {
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170 | NSData *partData = [self resolve:part[@"data"]];
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171 | [data appendData:partData];
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172 | } else if ([type isEqualToString:@"string"]) {
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173 | NSData *partData = [[RCTConvert NSString:part[@"data"]] dataUsingEncoding:NSUTF8StringEncoding];
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174 | [data appendData:partData];
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175 | } else {
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176 | [NSException raise:@"Invalid type for blob" format:@"%@ is invalid", type];
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177 | }
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178 | }
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179 | [self store:data withId:blobId];
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180 | }
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181 |
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182 | RCT_EXPORT_METHOD(release:(NSString *)blobId)
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183 | {
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184 | [self remove:blobId];
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185 | }
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186 |
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187 | #pragma mark - RCTURLRequestHandler methods
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188 |
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189 | - (BOOL)canHandleRequest:(NSURLRequest *)request
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190 | {
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191 | return [request.URL.scheme caseInsensitiveCompare:kBlobURIScheme] == NSOrderedSame;
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192 | }
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193 |
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194 | - (id)sendRequest:(NSURLRequest *)request withDelegate:(id<RCTURLRequestDelegate>)delegate
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195 | {
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196 |
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197 | if (!_queue) {
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198 | _queue = [NSOperationQueue new];
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199 | _queue.maxConcurrentOperationCount = 2;
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200 | }
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201 |
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202 | __weak __typeof(self) weakSelf = self;
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203 | __weak __block NSBlockOperation *weakOp;
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204 | __block NSBlockOperation *op = [NSBlockOperation blockOperationWithBlock:^{
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205 | __typeof(self) strongSelf = weakSelf;
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206 | if (!strongSelf) {
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207 | return;
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208 | }
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209 | NSURLResponse *response = [[NSURLResponse alloc] initWithURL:request.URL
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210 | MIMEType:nil
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211 | expectedContentLength:-1
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212 | textEncodingName:nil];
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213 |
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214 | [delegate URLRequest:weakOp didReceiveResponse:response];
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215 |
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216 | NSData *data = [strongSelf resolveURL:response.URL];
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217 | NSError *error;
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218 | if (data) {
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219 | [delegate URLRequest:weakOp didReceiveData:data];
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220 | } else {
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221 | error = [[NSError alloc] initWithDomain:NSURLErrorDomain code:NSURLErrorBadURL userInfo:nil];
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222 | }
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223 | [delegate URLRequest:weakOp didCompleteWithError:error];
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224 | }];
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225 |
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226 | weakOp = op;
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227 | [_queue addOperation:op];
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228 | return op;
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229 | }
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230 |
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231 | - (void)cancelRequest:(NSOperation *)op
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232 | {
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233 | [op cancel];
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234 | }
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235 |
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236 | #pragma mark - RCTNetworkingRequestHandler methods
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237 |
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238 |
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239 | - (BOOL)canHandleNetworkingRequest:(NSDictionary *)data
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240 | {
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241 | return data[@"blob"] != nil;
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242 | }
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243 |
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244 |
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245 | - (NSDictionary *)handleNetworkingRequest:(NSDictionary *)data
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246 | {
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247 |
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248 | NSDictionary *blob = [RCTConvert NSDictionary:data[@"blob"]];
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249 |
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250 | NSString *contentType = @"application/octet-stream";
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251 | NSString *blobType = [RCTConvert NSString:blob[@"type"]];
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252 | if (blobType != nil && blobType.length > 0) {
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253 | contentType = blob[@"type"];
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254 | }
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255 |
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256 | return @{@"body": [self resolve:blob], @"contentType": contentType};
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257 | }
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258 |
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259 | - (BOOL)canHandleNetworkingResponse:(NSString *)responseType
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260 | {
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261 | return [responseType isEqualToString:@"blob"];
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262 | }
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263 |
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264 | - (id)handleNetworkingResponse:(NSURLResponse *)response data:(NSData *)data
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265 | {
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266 |
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267 |
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268 | data = data ?: [NSData new];
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269 | return @{
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270 | @"blobId": [self store:data],
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271 | @"offset": @0,
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272 | @"size": @(data.length),
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273 | @"name": RCTNullIfNil([response suggestedFilename]),
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274 | @"type": RCTNullIfNil([response MIMEType]),
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275 | };
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276 | }
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277 |
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278 | #pragma mark - RCTWebSocketContentHandler methods
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279 |
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280 | - (id)processWebsocketMessage:(id)message
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281 | forSocketID:(NSNumber *)socketID
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282 | withType:(NSString *__autoreleasing _Nonnull *)type
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283 | {
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284 | if (![message isKindOfClass:[NSData class]]) {
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285 | *type = @"text";
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286 | return message;
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287 | }
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288 |
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289 | *type = @"blob";
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290 | return @{
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291 | @"blobId": [self store:message],
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292 | @"offset": @0,
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293 | @"size": @(((NSData *)message).length),
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294 | };
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295 | }
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296 |
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297 | @end
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