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Expose webserver's chunk api (#7134)

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* expose hidden WebServer's chunked API
This commit is contained in:
david gauchard 2020-04-07 02:49:34 +02:00 committed by GitHub
parent 3db610f6d0
commit d600cc7fa6
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 42 additions and 7 deletions
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29
libraries/ESP8266WebServer/examples/FSBrowser/FSBrowser.ino
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@ -186,12 +186,27 @@ void handleFileList() {
Dir dir = filesystem->openDir(path);
path.clear();
String output = "[";
while (dir.next()) {
File entry = dir.openFile("r");
if (output != "[") {
output += ',';
// use HTTP/1.1 Chunked response to avoid building a huge temporary string
if (!server.chunkedResponseModeStart(200, "text/json")) {
server.send(505, FPSTR("text/html"), FPSTR("HTTP1.1 required"));
return;
}
// use the same string for every line
String output;
output.reserve(64);
while (dir.next()) {
if (output.length()) {
// send string from previous iteration
// as an HTTP chunk
server.sendContent(output);
output = ',';
} else {
output = '[';
}
File entry = dir.openFile("r");
bool isDir = false;
output += "{\"type\":\"";
output += (isDir) ? "dir" : "file";
@ -205,8 +220,10 @@ void handleFileList() {
entry.close();
}
// send last string
output += "]";
server.send(200, "text/json", output);
server.sendContent(output);
server.chunkedResponseFinalize();
}
void setup(void) {

18
libraries/ESP8266WebServer/src/ESP8266WebServer.h
View File

@ -149,6 +149,24 @@ public:
void sendContent(const char *content) { sendContent_P(content); }
void sendContent(const char *content, size_t size) { sendContent_P(content, size); }
bool chunkedResponseModeStart_P (int code, PGM_P content_type) {
if (_currentVersion == 0)
// no chunk mode in HTTP/1.0
return false;
setContentLength(CONTENT_LENGTH_UNKNOWN);
send_P(code, content_type, "");
return true;
}
bool chunkedResponseModeStart (int code, const char* content_type) {
return chunkedResponseModeStart_P(code, content_type);
}
bool chunkedResponseModeStart (int code, const String& content_type) {
return chunkedResponseModeStart_P(code, content_type.c_str());
}
void chunkedResponseFinalize () {
sendContent(emptyString);
}
static String credentialHash(const String& username, const String& realm, const String& password);
static String urlDecode(const String& text);