log file will be deleted only on first run everytime

lib/nice_http.rb

@@ -77,6 +77,7 @@ def self.reset!
     @connections = []
     @active = 0
     @auto_redirect = true
+    @delete_log_file_content = true
   end
   reset!
 
@@ -193,16 +194,23 @@ def initialize(args = {})
     end
 
     begin
+      #only the first connection in the run will be deleting
+      if @delete_log_file_content
+        mode = "w"
+        @delete_log_file_content = false
+      else
+        mode = "a"
+      end
       if @log.kind_of?(String)
-        f = File.new(@log, "w")
+        f = File.new(@log, mode)
         f.sync = true
         @logger = Logger.new f
       elsif @log == :fix_file
-        f = File.new("nice_http.log", "w")
+        f = File.new("nice_http.log", mode)
         f.sync = true
         @logger = Logger.new f
       elsif @log == :file
-        f = File.new("nice_http_#{Time.now.strftime("%Y-%m-%d-%H%M%S")}.log", "w")
+        f = File.new("nice_http_#{Time.now.strftime("%Y-%m-%d-%H%M%S")}.log", mode)
         f.sync = true
         @logger = Logger.new f
       elsif @log == :screen

nice_http.gemspec

@@ -1,6 +1,6 @@
 Gem::Specification.new do |s|
   s.name        = 'nice_http'
-  s.version     = '1.3.1'
+  s.version     = '1.3.2'
   s.summary     = "NiceHttp -- simplest library for accessing and testing HTTP and REST resources."
   s.description = "NiceHttp -- simplest library for accessing and testing HTTP and REST resources. Manage different hosts on the fly. Easily get the value you want from the JSON strings. Use hashes on your requests."
   s.authors     = ["Mario Ruiz"]
@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
   s.extra_rdoc_files = ["LICENSE","README.md"]
   s.homepage    = 'https://github.com/MarioRuiz/nice_http'
   s.license       = 'MIT'
-  s.add_runtime_dependency 'nice_hash', ['>= 1.8.1']
+  s.add_runtime_dependency 'nice_hash', '~> 1.9', '>= 1.9.0'
   s.add_development_dependency 'rspec', '~> 3.8', '>= 3.8.0'
   s.add_development_dependency 'coveralls', '~> 0.8', '>= 0.8.22'
   s.test_files    = s.files.grep(%r{^(test|spec|features)/})