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Add const char* content to ESP8266WebServer::send() (#6797)

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* Add const char* content to ESP8266WebSerer::send()

Supercedes #3492

Allow sending raw binary data or strings directly without conversion to
a String to reduce memory overhead when possible.

From original @timw1971 PR #3492
Added public functions to allow content to be uploaded using const
char*. For some cases, this can remove the need for content to be copied
into a String, and thus can be considerably more space-efficient.

* Fix example formatting

* Make GIF example use static const array

* Make the example really need to use const char*

Make the generated GIF dynamic in the example and move the original to
PROGMEM (since that's where const arrays like this belong).
This commit is contained in:
Earle F. Philhower, III
2019-11-19 10:46:30 -07:00
committed by Develo
parent 919c753563
commit 36f903443b
2 changed files with 26 additions and 0 deletions
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9
libraries/ESP8266WebServer/src/ESP8266WebServer.h
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@ -127,6 +127,15 @@ public:
void send(int code, const char* content_type = NULL, const String& content = String(""));
void send(int code, char* content_type, const String& content);
void send(int code, const String& content_type, const String& content);
void send(int code, const char *content_type, const char *content, size_t content_length = 0) {
if (content_length == 0) {
content_length = strlen_P(content);
}
send_P(code, content_type, content, content_length);
}
void send(int code, const char *content_type, const uint8_t *content, size_t content_length) {
send_P(code, content_type, (const char *)content, content_length);
}
void send_P(int code, PGM_P content_type, PGM_P content);
void send_P(int code, PGM_P content_type, PGM_P content, size_t contentLength);