diff --git a/mpwo_client/src/mwpoApi/activities.js b/mpwo_client/src/mwpoApi/activities.js
index 5a2cbd01..a74f618b 100644
--- a/mpwo_client/src/mwpoApi/activities.js
+++ b/mpwo_client/src/mwpoApi/activities.js
@@ -1,44 +1,32 @@
-import { apiUrl } from '../utils'
+import { apiUrl, createRequest } from '../utils'
 
 export default class MpwoApi {
 
   static addActivity(formData) {
-    const request = new Request(`${apiUrl}activities`, {
+    const params = {
+      url: `${apiUrl}activities`,
       method: 'POST',
-      headers: new Headers({
-        Authorization: `Bearer ${window.localStorage.getItem('authToken')}`,
-      }),
       body: formData,
-    })
-    return fetch(request)
-      .then(response => response.json())
-      .catch(error => error)
+    }
+    return createRequest(params)
   }
 
   static addActivityWithoutGpx(data) {
-    const request = new Request(`${apiUrl}activities/no_gpx`, {
+    const params = {
+      url: `${apiUrl}activities/no_gpx`,
       method: 'POST',
-      headers: new Headers({
-        'Content-Type': 'application/json',
-        Authorization: `Bearer ${window.localStorage.getItem('authToken')}`,
-      }),
-      body: JSON.stringify(data)
-    })
-    return fetch(request)
-      .then(response => response.json())
-      .catch(error => error)
+      body: data,
+      type: 'application/json',
+    }
+    return createRequest(params)
   }
 
   static getActivityGpx(activityId) {
-    const request = new Request(`${apiUrl}activities/${activityId}/gpx`, {
+    const params = {
+      url: `${apiUrl}activities/${activityId}/gpx`,
       method: 'GET',
-      headers: new Headers({
-        Authorization: `Bearer ${window.localStorage.getItem('authToken')}`,
-      }),
-    })
-    return fetch(request)
-      .then(response => response.json())
-      .catch(error => error)
+    }
+    return createRequest(params)
   }
 
 }
diff --git a/mpwo_client/src/mwpoApi/index.js b/mpwo_client/src/mwpoApi/index.js
index 9b18f4b1..e0f15506 100644
--- a/mpwo_client/src/mwpoApi/index.js
+++ b/mpwo_client/src/mwpoApi/index.js
@@ -1,4 +1,4 @@
-import { apiUrl } from '../utils'
+import { apiUrl, createRequest } from '../utils'
 
 export default class MpwoApi {
 
@@ -9,56 +9,40 @@ export default class MpwoApi {
     } else if (page) {
       url = `${url}?page=${page}`
     }
-    const request = new Request(url, {
+    const params = {
+      url: url,
       method: 'GET',
-      headers: new Headers({
-        'Content-Type': 'application/json',
-        Authorization: `Bearer ${window.localStorage.getItem('authToken')}`,
-      }),
-    })
-    return fetch(request)
-      .then(response => response.json())
-      .catch(error => error)
+      type: 'application/json',
+    }
+    return createRequest(params)
   }
 
   static addData(target, data) {
-    const request = new Request(`${apiUrl}${target}`, {
+    const params = {
+      url: `${apiUrl}${target}`,
       method: 'POST',
-      headers: new Headers({
-        'Content-Type': 'application/json',
-        Authorization: `Bearer ${window.localStorage.getItem('authToken')}`,
-      }),
-      body: JSON.stringify(data)
-    })
-    return fetch(request)
-      .then(response => response.json())
-      .catch(error => error)
+      body: data,
+      type: 'application/json',
+    }
+    return createRequest(params)
   }
 
   static updateData(target, data) {
-    const request = new Request(`${apiUrl}${target}/${data.id}`, {
+    const params = {
+      url: `${apiUrl}${target}/${data.id}`,
       method: 'PATCH',
-      headers: new Headers({
-        'Content-Type': 'application/json',
-        Authorization: `Bearer ${window.localStorage.getItem('authToken')}`,
-      }),
-      body: JSON.stringify(data)
-    })
-    return fetch(request)
-      .then(response => response.json())
-      .catch(error => error)
+      body: data,
+      type: 'application/json',
+    }
+    return createRequest(params)
   }
 
   static deleteData(target, id) {
-    const request = new Request(`${apiUrl}${target}/${id}`, {
+    const params = {
+      url: `${apiUrl}${target}/${id}`,
       method: 'DELETE',
-      headers: new Headers({
-        'Content-Type': 'application/json',
-        Authorization: `Bearer ${window.localStorage.getItem('authToken')}`,
-      }),
-    })
-    return fetch(request)
-      .then(response => response)
-      .catch(error => error)
+      type: 'application/json',
+    }
+    return createRequest(params)
   }
 }
diff --git a/mpwo_client/src/mwpoApi/user.js b/mpwo_client/src/mwpoApi/user.js
index 37f55d2b..659de485 100644
--- a/mpwo_client/src/mwpoApi/user.js
+++ b/mpwo_client/src/mwpoApi/user.js
@@ -1,62 +1,51 @@
-import { apiUrl } from '../utils'
+import { apiUrl, createRequest } from '../utils'
 
 export default class MpwoApiUser {
 
   static login(email, password) {
-    const request = new Request(`${apiUrl}auth/login`, {
+    const params = {
+      url: `${apiUrl}auth/login`,
       method: 'POST',
-      headers: new Headers({
-        'Content-Type': 'application/json',
-      }),
-      body: JSON.stringify({
+      noAuthorization: true,
+      body: {
         email: email,
         password: password,
-      }),
-    })
-    return fetch(request)
-      .then(response => response.json())
-      .catch(error => error)
+      },
+      type: 'application/json',
+    }
+    return createRequest(params)
   }
 
   static register(username, email, password, passwordConf) {
-    const request = new Request(`${apiUrl}auth/register`, {
+    const params = {
+      url: `${apiUrl}auth/register`,
       method: 'POST',
-      headers: new Headers({
-        'Content-Type': 'application/json',
-      }),
-      body: JSON.stringify({
+      noAuthorization: true,
+      body: {
         username: username,
         email: email,
         password: password,
         password_conf: passwordConf,
-      }),
-    })
-    return fetch(request)
-      .then(response => response.json())
-      .catch(error => error)
+      },
+      type: 'application/json',
+    }
+    return createRequest(params)
   }
 
   static getProfile() {
-    const request = new Request(`${apiUrl}auth/profile`, {
+    const params = {
+      url: `${apiUrl}auth/profile`,
       method: 'GET',
-      headers: new Headers({
-        'Content-Type': 'application/json',
-        Authorization: `Bearer ${window.localStorage.getItem('authToken')}`,
-      }),
-    })
-    return fetch(request)
-      .then(response => response.json())
-      .catch(error => error)
+      type: 'application/json',
+    }
+    return createRequest(params)
   }
 
   static updateProfile(form) {
-    const request = new Request(`${apiUrl}auth/profile/edit`, {
+    const params = {
+      url: `${apiUrl}auth/profile/edit`,
       method: 'POST',
-      headers: new Headers({
-        'Content-Type': 'application/json',
-        Authorization: `Bearer ${window.localStorage.getItem('authToken')}`,
-      }),
-      body: JSON.stringify({
+      body: {
         first_name: form.firstName,
         last_name: form.lastName,
         bio: form.bio,
@@ -64,35 +53,26 @@ export default class MpwoApiUser {
         birth_date: form.birthDate,
         password: form.password,
         password_conf: form.passwordConf,
-      }),
-    })
-    return fetch(request)
-      .then(response => response.json())
-      .catch(error => error)
+      },
+      type: 'application/json',
+    }
+    return createRequest(params)
   }
 
   static updatePicture(form) {
-    const request = new Request(`${apiUrl}auth/picture`, {
+    const params = {
+      url: `${apiUrl}auth/picture`,
       method: 'POST',
-      headers: new Headers({
-        Authorization: `Bearer ${window.localStorage.getItem('authToken')}`,
-      }),
       body: form,
-    })
-    return fetch(request)
-      .then(response => response.json())
-      .catch(error => error)
+    }
+    return createRequest(params)
   }
 
   static deletePicture() {
-    const request = new Request(`${apiUrl}auth/picture`, {
+    const params = {
+      url: `${apiUrl}auth/picture`,
       method: 'DELETE',
-      headers: new Headers({
-        Authorization: `Bearer ${window.localStorage.getItem('authToken')}`,
-      }),
-    })
-    return fetch(request)
-      .then(response => response.json())
-      .catch(error => error)
+    }
+    return createRequest(params)
   }
 }
diff --git a/mpwo_client/src/utils.js b/mpwo_client/src/utils.js
index 2c95420e..cc06667b 100644
--- a/mpwo_client/src/utils.js
+++ b/mpwo_client/src/utils.js
@@ -17,6 +17,32 @@ export const generateIds = arr => {
     })
 }
 
+
+export const createRequest = params => {
+  const headers = {}
+  if (!params.noAuthorization) {
+    headers.Authorization = `Bearer ${
+      window.localStorage.getItem('authToken')}`
+  }
+  if (params.type) {
+    headers['Content-Type'] = params.type
+  }
+  const requestParams = {
+    method: params.method,
+    headers: headers,
+  }
+  if (params.type === 'application/json' && params.body) {
+    requestParams.body = JSON.stringify(params.body)
+  } else if (params.body) {
+    requestParams.body = params.body
+  }
+  const request = new Request(params.url, requestParams)
+  return fetch(request)
+    .then(response => response.json())
+    .catch(error => error)
+}
+
+
 export const getGeoJson = gpxContent => {
   let jsonData
   if (gpxContent) {