AMQP::Reliable::publish() now takes std::string_view + added extra constructor to AMQP::Envelope

Author: EmielBruijntjes

include/amqpcpp/envelope.h

@@ -4,7 +4,7 @@
  *  When you send or receive a message to the rabbitMQ server, it is encapsulated
  *  in an envelope that contains additional meta information as well.
  *
- *  @copyright 2014 - 2020 Copernica BV
+ *  @copyright 2014 - 2023 Copernica BV
  */
 
 /**
@@ -53,6 +53,7 @@ class Envelope : public MetaData
      *  @param  size
      */
     Envelope(const char *body, uint64_t size) : MetaData(), _body(body), _bodySize(size) {}
+    Envelope(const char *body) : Envelope(body, strlen(body)) {}
 
     /**
      *  Read envelope frmo an input-buffer

include/amqpcpp/reliable.h

@@ -9,7 +9,7 @@
  *  throttling at the same time.
  *  
  *  @author Michael van der Werve <[email protected]>
- *  @copyright 2020 - 2022 Copernica BV
+ *  @copyright 2020 - 2023 Copernica BV
  */
 
 /**
@@ -239,9 +239,9 @@ class Reliable : public BASE
      *  @param  flags       optional flags
      *  @return bool
      */
-    DeferredPublish &publish(const std::string &exchange, const std::string &routingKey, const std::string &message, int flags = 0) { return publish(exchange, routingKey, Envelope(message.data(), message.size()), flags); }
-    DeferredPublish &publish(const std::string &exchange, const std::string &routingKey, const char *message, size_t size, int flags = 0) { return publish(exchange, routingKey, Envelope(message, size), flags); }
-    DeferredPublish &publish(const std::string &exchange, const std::string &routingKey, const char *message, int flags = 0) { return publish(exchange, routingKey, Envelope(message, strlen(message)), flags); }
+    DeferredPublish &publish(const std::string_view &exchange, const std::string_view &routingKey, const std::string_view &message, int flags = 0) { return publish(exchange, routingKey, Envelope(message.data(), message.size()), flags); }
+    DeferredPublish &publish(const std::string_view &exchange, const std::string_view &routingKey, const char *message, size_t size, int flags = 0) { return publish(exchange, routingKey, Envelope(message, size), flags); }
+    DeferredPublish &publish(const std::string_view &exchange, const std::string_view &routingKey, const char *message, int flags = 0) { return publish(exchange, routingKey, Envelope(message, strlen(message)), flags); }
 
     /**
      *  Publish a message to an exchange. See amqpcpp/channel.h for more details on the flags. 
@@ -254,7 +254,7 @@ class Reliable : public BASE
      *  @param  size        size of the message
      *  @param  flags       optional flags
      */
-    DeferredPublish &publish(const std::string &exchange, const std::string &routingKey, const Envelope &envelope, int flags = 0)
+    DeferredPublish &publish(const std::string_view &exchange, const std::string_view &routingKey, const Envelope &envelope, int flags = 0)
     {
         // publish the entire thing, and remember if it failed at any point
         uint64_t tag = BASE::publish(exchange, routingKey, envelope, flags);